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

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Question 198429: 3X2+11X=4
Click here to see answer by nerdybill(7003)

Question 198572: Could someone help me with these, I had it last year but forgot how it works:
1) Find a quadratic equation with roots (4+i)and(4-i).
2) Given the equation x^3-2x^2+x-3=0, what are the possible rational roots??
3) Find the irratinal roots of the equation; x^3-4x^2+2x+1=0 I should use the quadratic formula to solve the equation, it might sound stupid but I never really understood how to use the quadratic formula =(

Click here to see answer by jim_thompson5910(28715)

Question 198867: Please help me solve by completing the square:
3x^2-2x-4=0
Click here to see answer by jim_thompson5910(28715)

Question 198895: Find the value of square root of 30 to the nearest tenth.
Click here to see answer by jim_thompson5910(28715)

Question 198995: how can i solve this problem??
this fraction is square rooted so yeahhh its 81 over 49 ?????? help please
Click here to see answer by jim_thompson5910(28715)

Question 199164: Using rational exponents I need to rewrite the expression
8√ x^2
Click here to see answer by jim_thompson5910(28715)

Question 199257: Could someone help me with these:
What is the sum of the roots of the equation ax^2+bx+c=0 ?
What is the product of their roots?
How would I solve this equation x^3+2x^2+x+2=0, if -2 is a root?
Click here to see answer by stanbon(57967)

Question 199271: add or subtract. simplify when possible. 5 squareroot of 3/10 +2 squareroot of 5/6 -6 squareroot of 15/30
Click here to see answer by RAY100(1637)

Question 199373: Radical 4/81?
Click here to see answer by solver91311(17077)

Question 199483: hey ya all thanx to your help I havent be around here for a while...but even the best of luck faids away sometimes, and I am back again, with problems again, would someone be as nice as to help me out here again? =) Please
My problem; Approximate to the nearest tenth, the real root of the equation f(x)=x^3-4=0, I dont at all get this one.
Click here to see answer by solver91311(17077)

Question 199548: can you give me an example of this lesson?
Click here to see answer by solver91311(17077)

Question 199838: 3 + sqrt 3x - 2 = -5
Click here to see answer by jerrybassmasta(14)

Question 199837: 13 sqrt 20 - 15 sqrt 32 - 8 sqrt 45 + 7 sqrt 8
Click here to see answer by RAY100(1637)

Question 199837: 13 sqrt 20 - 15 sqrt 32 - 8 sqrt 45 + 7 sqrt 8
Click here to see answer by jim_thompson5910(28715)

Question 199971: 5 times sqrt of 24 + sqrt of 81 + 3 times sqrt of 18
combine without calculator or table of square roots

Click here to see answer by Alan3354(31518)

Question 199971: 5 times sqrt of 24 + sqrt of 81 + 3 times sqrt of 18
combine without calculator or table of square roots

Click here to see answer by tutorcecilia(2152)

Question 199977: (sqrt of 12 - sqrt of 5)(sqrt of 5 + 2 times sqrt of 12)
using the FOIL method..sorry I don't know how to do the sqrt sign with the keyboard.
Click here to see answer by ankor@dixie-net.com(15746)

Question 200046: 2 divided by sqrt of 10
Click here to see answer by jim_thompson5910(28715)

Question 200045: sqrt of 52 divided by sqrt of 13
Click here to see answer by checkley77(12569)

Question 200305: if 45 is n what is the expression for the number 35 in relation to n

Click here to see answer by Alan3354(31518)

Question 200505: squareroot of negative w then subracting 6=w
Click here to see answer by jim_thompson5910(28715)

Question 200603: sqrt 2 (sqrt 50 + sqrt 10)
Click here to see answer by nerdybill(7003)

Question 200609: Solve r=sqrt 2a/0 for 0
Click here to see answer by rfer(12730)

Question 200785: sqrt 2 / sqrt 18
Click here to see answer by ankor@dixie-net.com(15746)

Question 200784: (3 - 2 sqrt 7) * (3 + 2 sqrt 7)
Click here to see answer by stanbon(57967)

Question 200783: sqrt 2t^5 * sqrt 10 t^4
Click here to see answer by stanbon(57967)

Question 200782: (3 sqrt 2) * (-4 sqrt 10)
Click here to see answer by stanbon(57967)

Question 200780: 3 sqrt (-27 y^36/1000)
Click here to see answer by ankor@dixie-net.com(15746)

Question 200781: (3 sqrt 2) * (-4 sqrt 10)
Click here to see answer by jim_thompson5910(28715)

Question 200824: x^2 + x + sqrt x^2 + x – 2 = 0
Click here to see answer by RAY100(1637)

Question 200821: (3 sqrt 3)^4
Click here to see answer by RAY100(1637)

Question 200951: Simplify
sqrt 12c^6

Click here to see answer by jim_thompson5910(28715)

Question 200953: The time t (in seconds) that it takes for a cliff diver to reach the water is a function of the height h (in feet) from which he dives:
t = sqrt h /16
Find the exact time that it takes for a diver to hit the water when diving from 25 feet.
Click here to see answer by solver91311(17077)

Question 200950: Simplify sqrt 5 / sqrt 11
Click here to see answer by nerdybill(7003)

Question 200950: Simplify sqrt 5 / sqrt 11
Click here to see answer by user_dude2008(1861)

Question 200952: Simplify
sqrt 28y /121

Click here to see answer by user_dude2008(1861)

Question 201007: Please help me in solving x^4-64.
This is how I believe it's supposed to be solved
x^4-64 I take the 4th root of x and get x, and the 3rd root of -64 and get -4, which can be simplified further to 2. My answer then is x-2. On the other hand I looked at factoring x^4-64 by factoring like so, (x^2+8)(x^2+8), then (x^2+8)(x+4)(x-2)but this would give me a middle term. Please help.
Click here to see answer by Earlsdon(6294)

Question 201100: The time t (in seconds) that it takes for a cliff diver to reach the water is a function of the
height h (in feet) from which he dives:
t = sqrt h /16
Find the exact time that it takes for a diver to hit the water when diving from 25 feet.
t = sqrt h/16 = sqrt 25/16
Solve by factoring.
z^2 - 3z - 18 = 0
-6 * 3 = -18
-6 + 3 = -3
Simplify the following radical:
3 − 64c^15/3 sqrt x^15

Click here to see answer by Alan3354(31518)

Question 201122: Can someone please help me with this:
Simplify the expression.
3(square root)8 (times) 3(square root) 64
Click here to see answer by jim_thompson5910(28715)

Question 201170: square root of a 4
Click here to see answer by rfer(12730)

Question 201189: The volume of a cube is given by V = s3, where s is the length of a side. Find the length of a side of a cube if the volume is 500 cm3. Round answer to three decimal places
Click here to see answer by Alan3354(31518)

Question 201261: 5square root of 20 minus the square root of 45 plus 2square root 80. the 5 and the 2 are just outside their prospective square root numbers. Do you multiply the squared out number by the number already outside the square root symbol. please provide the answer to the equation as well thank you spencer
Click here to see answer by rfer(12730)

Question 201299: Find the perfect square trinomial whose first two terms are:
a^2 - 4a

Click here to see answer by Earlsdon(6294)

Question 201301: Solve the following equation
2y – 3/2 = sqrt 729 / 4 + y

Click here to see answer by RAY100(1637)

Question 201429: I really can't figure out how the answer is 16. Can you help, please?
8+2 √5² - 3²
That is 5 squared - 3 squared.
5 squared = 25 3 squared = 9 so 25 - 9 = 16 but what is to be done with the 8 + 2 in the beginning?
Thanks for your help - Jamie
Click here to see answer by stanbon(57967)

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