SOLUTION: Rationalize the denominator of the expression. Assume that all variables are postive when they appear. 1. 4/√x+h-√x The answer I have is A. 4(√x+h-√x/h B

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: Rationalize the denominator of the expression. Assume that all variables are postive when they appear. 1. 4/√x+h-√x The answer I have is A. 4(√x+h-√x/h B      Log On


   

Question 174540: Rationalize the denominator of the expression. Assume that all variables are postive when they appear.
1. 4/√x+h-√x The answer I have is A. 4(√x+h-√x/h B. 4(√x+h+√x/h or C. 4√x+h+√x/h or D. 4√h/h I choosen D is that correct?
2. √5/√2+3 I have chosen √10+3√5/-7 for my answer is that correct?
3. Simplify the expression : √32x^2y/49 I have choosen 4√2x^2y/7 is that correct or is it 4x√2y/7?
I am stuck.

Can you help me? Thank you
Answer by rapaljer(4671) About Me  (Show Source):
You can put this solution on YOUR website!
1. Was the problem stated: 4%2F%28sqrt%28x%2Bh%29-sqrt%28x%29%29???
If so, the answer is 4%28sqrt%28x%2Bh%29+%2B+sqrt%28x%29+%29%2F+h+. I think that would be B, but you forgot to close the parentheses in the numerator.

2. Looks correct!

3. sqrt%28%2832x%5E2y%29%2F49%29
= sqrt%28%2816x%5E2%29%2F49%29%2Asqrt%282y%29
=%28%284x%29%2F7%29%2Asqrt%282y%29
=+%284x+%2Asqrt%282y%29%29%2F7
R^2