Questions on Algebra: Radicals -- complicated equations involving roots answered by real tutors!

Tutors Answer Your Questions about Radicals (FREE)

Question 300409: what is 2(squareroot)2=(squareroot)u and how do you do it
Click here to see answer by nerdybill(6951)

Question 300409: what is 2(squareroot)2=(squareroot)u and how do you do it
Click here to see answer by Stitch(352)

Question 300420: What is the value of: x*y=3 x+y=-1?
Click here to see answer by Fombitz(13828)

Question 300478: I do not understand the problem square root of 25b^4/196c^6
Click here to see answer by JBarnum(2044)

Question 300560: i have been trying for days to figure out these problems. i thaught maybe someone could please help me. how do you simplify: 7 times the square root of 3 + the square root of 48
Click here to see answer by dabanfield(803)

Question 300576: How do you do you solve, 3 radical 4?
Click here to see answer by dabanfield(803)

Question 300854: simplify: ( very confused please help)
radical a / radical b- radical a
Click here to see answer by Fombitz(13828)

Question 300965: Please help me solve (2 radical 2)squared. I came up with the answer 4, as did the calculator but the book says the answer is 8. Can you show me how to solve this with the steps please? Thanks in advance!
Click here to see answer by josmiceli(9664)

Question 301130: Hello. I am struggling with this equation - (2√7+3)(3√7-4) I know that we are supposed to FOIL so when I worked the problem this is what I got 6√7-8√7+9√7-12 cant be the right method because the book says the answer is 30+√7. Can someone tell me what I'm doing wrong? Thanks in advance :)
Click here to see answer by jim_thompson5910(28536)

Question 301198: Okay I have two questions (5 +2 rad 3) squared. And another question is 5 over 2- rad 5. PLEASE help!!! I have a huge test tomorrow!!!!
Click here to see answer by Alan3354(30992)

Question 301392: At a height of h meters, you can see V kilometers to the horizon. These numbers are related to the formula v=3.5. How far can a sailor see to the horizon from the top of a mass that is 45 m high?
Round to the nearest whole number.
Would the answer be 23 feet?

Click here to see answer by solver91311(16872)

Question 301396: Using the formula L= 0.000169d^2.27/h, where L is the proper length in feet of the letters painted on the pavement. D is the distance in feet from the car to the lettering, and h is the height in feet from the eye of the road. Find the height l of a road-pavement message when H=4ft and D=200 ft.
Round to the nearest tenth of a foot.
Would the answer be 7.1 feet?
Click here to see answer by checkley77(12569)

Question 301512: 3 square root 12 + 4 square root3
Click here to see answer by josmiceli(9664)

Question 301501: the square root of 8 over the square root of 5
Click here to see answer by rfer(12654)

Question 301676: Solve: (x^2 - 5x +5)^(x^2 - 9x +20) = 1
Click here to see answer by Alan3354(30992)

Question 301716: I am struggling with radical expressions.
So here is the problem:
1.Many people know that the weight of an object varies on different planets, but did you know that the weight of an object on Earth also varies according to the elevation of the object? In particular, the weight of an object follows this equation: w = Cr^-2 , where C is a constant, and r is the distance that the object is from the center of Earth.
a.Solve the equation w = Cr^-2,for r.
I tried it on my own, but I am not sure if I did it correctly. Here is what I got:
w/C = r^-2
r=2√(w/C)
Now I am not sure how to type the radcial correctly but the 2 is being multiplied by the radical. It is supposed to be one of those miniture numbers at the top of the radical. Gosh I hope this makes since, I couldn't get it to copy and past correctly.
I appreciate any assistance you can provide,
Taylor
Click here to see answer by richwmiller(9135)

Question 301961: sqrt(250)
Click here to see answer by london maths tutor(243)

Question 302075: I have an algebra problem that is asking for the square root of 20/48....in the example they give the answer to be 0.6 which is rounded off....can you explain this to me?>
Click here to see answer by richwmiller(9135)

Question 302058: Simplify the expression by rationalizing the denominator. Simplest form.
sqrt 5/18 Can you help me with how you go about this?
Click here to see answer by checkley77(12569)

Question 302280: I need help factoring, how do I do this problem?
15y^2+7y-2
Click here to see answer by stanbon(57277)

Question 302284: I need help solving this equation:
y^3-y^2-6y=0
Click here to see answer by jim_thompson5910(28536)

Question 302406: 12 cd^3/18 c^5d2
simplify if possible
Click here to see answer by london maths tutor(243)

Question 302426: Multiply and if possible simplify
x-7 * x^2-3x-28
________________
(x+4)^2 * (x-7)^2
Click here to see answer by london maths tutor(243)

Question 302799: radical 32 divided by 4
otherwise known as
the square root of 32 divided by four
Click here to see answer by solver91311(16872)

Question 302856: symplify by rationalizing the denominator. I need help please.
4sqrt[6] / sqrt[30]
Click here to see answer by london maths tutor(243)

Question 302985: 5-3x x+1
_____ - _____
x^2-2x+1 x^2-2x+1
simplify if possible
Click here to see answer by stanbon(57277)

Question 302998: simplify if possible
9x^2-15x/12x-20
Click here to see answer by mananth(12270)

Question 302999: t^2+4/t+2 simplify if possible
Click here to see answer by helpnalgebra(91)

Question 302960: Accuplacer practice again: square root of 2x^6 times square root of 6x^4. The answer given is 2x^5 times square root of 3, but how? Please note I need all (even ridiculously obvious) steps shown to get to the answer, because, um well I'm somewhat dense. Thanks much, Mike
Click here to see answer by checkley77(12569)

Question 302920: How do you perform the necessary steps to isolate the radical on the right-hand side of the equation?
3x - 6 = 2x + 2y + 1 - 9
2y + 1 is under a radical

Thank you!

Click here to see answer by ankor@dixie-net.com(15643)

Question 303130: the square root of 400x^2y6
Click here to see answer by vleith(2825)

Question 303098: 2 square root 1-3x-square root x+17=0
Click here to see answer by nyc_function(2733)

Question 303138: square root of (-4) x square root of (-4)
Click here to see answer by CharlesG2(828)

Question 303299: √x^2+9x+14=x+4
Click here to see answer by Fombitz(13828)

Question 303312: How would you solve the sqaure root of 10 over the square root of 4?
Click here to see answer by nyc_function(2733)

Question 303317: How do you simplify square root 10 over square root 4? do you multiply both terms by sqaure root 4 and get sqaure root 40 and then the bottom sqaure root 16? then how do you simplify it?
Click here to see answer by user_dude2008(1861)

Question 303326: how do you solve 10 over the sqaure root of 12?
Click here to see answer by user_dude2008(1861)

Question 303333: How do you solve 40 over the square root of 2
40
---
√2
Click here to see answer by jim_thompson5910(28536)

Question 303334: ok, how do you do the square root of 144 over the sqaure root of 36??
√144
-----
√36
Click here to see answer by jim_thompson5910(28536)

Question 303334: ok, how do you do the square root of 144 over the sqaure root of 36??
√144
-----
√36
Click here to see answer by dabanfield(803)

Question 303435: Please help me solve this problem : BIG RADICAL SIGN 242x^2 OVER 9 . Thank you
Click here to see answer by WickedHeroine02(1)

Question 303584: Multiply:
(5*sqrt7 - 15*sqrt2) * (2*sqrt7 + 6*sqrt2)
Rationalize the denominator:
sqrt(c)-sqrt(d)/sqrt(c)+sqrt(d)
Please help walk me through these problem! I cannot find anything in the book that works with these types of problems! Thank you in advance for your help!!
Click here to see answer by mananth(12270)

Question 303587: 25^-3/2
Click here to see answer by london maths tutor(243)

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