Questions on Algebra: Square root, cubic root, N-th root answered by real tutors!

Tutors Answer Your Questions about Square-cubic-other-roots (FREE)

Question 74659: Evaluate: , if possible
My answer was 24, but the answers given was:
a)-4
b)-8
c)-64/3
d) Not a real number
Is there something I am doing wrong, or is there another way of doing this problem to get one of these answers? Thanks
Click here to see answer by funmath(2925)

Question 74657: Determine whether is rational or irrational.
My answer was irrational. Is this correct? Thanks.
Click here to see answer by funmath(2925)

Question 74658: Determine whether is rational or irrational.
My answer was rational. Is this correct? Thanks.
Click here to see answer by funmath(2925)

Question 74655: Use a calculator to approximate to the nearest hundredth.
I am needing some help with this. Thanks
Click here to see answer by funmath(2925)

Question 74656: Determine whether is rational or irrational.
I needed to verify that this is irrational. Thanks.
Click here to see answer by venugopalramana(3286)

Question 74654: Simplify.
I needed to verify my answer of was correct. Thanks.
Click here to see answer by venugopalramana(3286)

Question 74654: Simplify.
I needed to verify my answer of was correct. Thanks.
Click here to see answer by funmath(2925)

Question 74654: Simplify.
I needed to verify my answer of was correct. Thanks.
Click here to see answer by joshg(1)

Question 74627: (a+b)2
(a+b)3
Click here to see answer by jim_thompson5910(28536)

Question 74737: square root of 3(8+2square root of 3)
Click here to see answer by jim_thompson5910(28536)

Question 74916: How do you complete a square? Ex: M to the second power - 20m.
Click here to see answer by Nate(3500)

Question 75070: 4/the square root of 7
Click here to see answer by ptaylor(2048)

Question 75410: Is it possible to find the square root of a number that is not a perfect square without a calculator? Such as 80? 195? etc...
Click here to see answer by stanbon(57282)

Question 75410: Is it possible to find the square root of a number that is not a perfect square without a calculator? Such as 80? 195? etc...
Click here to see answer by checkley75(3666)

Question 75325: Help to simplify :
4 times the square root of 8 times the square root of 2
Click here to see answer by checkley75(3666)

Question 75318: Help to simplify :
5 times the square roo ot 16 times the square root o 2
Click here to see answer by checkley75(3666)

Question 75530: what are all of the solutions of 2/3(x-3)^2=4
Click here to see answer by funmath(2925)

Question 75646: Back in the good old days, they taught us a 'long hand' method for solving Square, Cube, and Nth roots of any number. For instance square root of 139, or 6th root of 13. I have since forgotten (after 35years) how to do that and want to teach my son, rather than the current approach of memorizing your perfect squares, cubes, etc. Those formulas exist and are embedded in modern scientific calculators, but I am unable to find them in any textbook, online, etc.
Please remind me how to do this.
Thanks
Click here to see answer by Edwin McCravy(8893)

Question 75672: A six digit number has a six in one's place. Can its square root be a prime number?
Click here to see answer by jim_thompson5910(28536)

Question 75719: I am stumped on these two problems. I am not sure how to solve them.
simplify..
sqrt 7 x ^ 2
my answer for this is... x sqrt 7x
3 sqrt 486
can this one even be simplified?
Click here to see answer by checkley75(3666)

Question 75770: Find the volume of a box that measures 3 1/4in. by 2 2/3 in. by 2 1/2 in. Do not forget to include the correct units in your answer
Click here to see answer by checkley75(3666)

Question 75847: A triangle has 3 sides: b – 2, 2b + 4, and 3b -6. Find the expression that represents its perimeter.
Click here to see answer by tutorcecilia(2152)

Question 75841: Use the square root property to solve:
2x^2 - 150 = 0
Click here to see answer by tutorcecilia(2152)

Question 76292: Please help to simplify
3i - 2i^2 + 3
DIvided by
the square root of -16 - the square root of -2 times the square root of -2
Click here to see answer by stanbon(57282)

Question 76494: What is the square root of 20 over the square root of 15 in a simplified expression?
Click here to see answer by Cintchr(481)

Question 76515: how do I simplify the expression square root of 16a^4 x^4?
Click here to see answer by checkley75(3666)

Question 76615: tell me if i did this problem correct
square root of 2x + 5 + 8 = 17
= square root of 2x + 13 = 17
= 2x + 13 -13 = 17 - 13 = 4
=2x = 4
__ __
2 2
x = 2
Click here to see answer by ptaylor(2048)

Question 76778: how do you solve x^4 - 4*y^4 ?
Click here to see answer by Nate(3500)

Question 76888: Find all the roots of the equation below given that one fo the roots is -4:
Click here to see answer by jim_thompson5910(28536)

Question 77023: 3=2/5(n+7)
Click here to see answer by checkley75(3666)

Question 77275: i need to simplify the square root of 12 times the square root of 15

Click here to see answer by checkley75(3666)

Question 77275: i need to simplify the square root of 12 times the square root of 15

Click here to see answer by tutorcecilia(2152)

Question 77555: what is the square root of 40x?
Click here to see answer by jim_thompson5910(28536)

Question 77539: Please help me begin to solve:
1-2/x-8/x^2=0
Click here to see answer by jim_thompson5910(28536)

Question 77785: We are studying nth roots and rational exponents and I need help!
Problem:
4/square root of 176 + 4/square root of 11=
Problem: How do you type in the square root of problems using symbols?
Click here to see answer by Edwin McCravy(8893)

Question 78453: hsving trouble understanding N-th root. Can you explain what it is, and how to solve problems with them. I have muddled thru square root ok, but having a little problem with cubic root, and don't know anything at all about N-th root.
Any help will be greatly appreciated. By the way, I am a 72 year old lady trying to learn Algebra. So far, so good. Thanks. Mary
Click here to see answer by stanbon(57282)

Question 78595: How do you complete the square for (((2x^2+3x+4=0)))?
Click here to see answer by josmiceli(9664)

Question 78554: Evaluate the expression. Give the exact value if possible. Otherwise, approzimate to the nearest hundredth.
the positive or negative square root of 70.

I don't know how you figure it out. Please help!
Click here to see answer by checkley75(3666)

Question 78687: Can you please tell me how do I add these roots:
2 1/4+ 18 1/3 + 32 1/2
Click here to see answer by SmurfDude(4)

Question 78697: Please help me solve the following problem for c.
550,000 = {1} Divided by {2pie}Times the square root of {.000000000010 Times c}
The text provideds the answer but does not explain how to slove it.

Any help would be greatly appreciated.
Thanks,
Michael H.
Click here to see answer by mathdoc314(58)

Question 79060: square root 8 times 6 square root 8
write in simplified radical form
Click here to see answer by rapaljer(4667)

Question 79139: simplify: the square root of 125 minus 7 times the square root of 98 minus the square root of 3/7.
sqrt means square root.
sqrt(125)-7*sqrt(98)-sqrt(3/7)
Click here to see answer by stanbon(57282)

Question 79475: I am stuck on my last question. the word problem is "a store has 360 square meters of floor space. The length of the store is 9 meters greater than its width. Find the length and width." I started to resolve this by w(w+9)= 360. Then I put it into an equation which is w^2 + 6w = 360, then I made the equation = zero by subtracting 360 and moving it to the left side of the equation. Now I am stuck.
thanks,
Michael
Click here to see answer by stanbon(57282)

Question 79542: I suspect that the second statement is false. Can you please explain where I'm going wrong?
3/(square(2,5)) = 3/(5^1/2) = 3(5^-1/2)
3/(square(2,5)) = 3/(square(2,5)) * [(square(2,5))/(square(2,5))] = 3(square(2,5))/5 = 3(5^1/2)/5
Click here to see answer by Earlsdon(6287)

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