SOLUTION: I have solved many algebric questions but i faced problems in simplyfing the answar having sqrt_to match with books answer. Kindly simplyfy it my ans 49/(7-sqrt42) The book ans

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Question 935160: I have solved many algebric questions but i faced problems in simplyfing the answar having sqrt_to match with books answer. Kindly simplyfy it my ans
49/(7-sqrt42)
The book ans is
7(7+sqrt42)
Found 3 solutions by josgarithmetic, vicgonzerx, MathTherapy:
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
49%2F%287-sqrt42%29

Multiply by 1 in the form of %287%2Bsqrt%2842%29%29%2F%287%2Bsqrt%2842%29%29, and simplify from that result.

Answer by vicgonzerx(31) About Me  (Show Source):
You can put this solution on YOUR website!
JUST RATIONALIZE UR ANSWER
[49/(7-SQRT42)]

Answer by MathTherapy(10552) About Me  (Show Source):
You can put this solution on YOUR website!

I have solved many algebric questions but i faced problems in simplyfing the answar having sqrt_to match with books answer. Kindly simplyfy it my ans
49/(7-sqrt42)
The book ans is
7(7+sqrt42)


49%2F%287+-+sqrt%2842%29%29

49%287+%2B+sqrt%2842%29%29%2F%287+-+sqrt%2842%29%29%287+%2B+sqrt%2842%29%29 ------- Rationalizing denominator

49%287+%2B+sqrt%2842%29%29%2F%2849+-+42%29 ------------ FOILing denominator

49%287+%2B+sqrt%2842%29%29%2F7

7cross%2849%29%287+%2B+sqrt%2842%29%29%2Fcross%287%29________highlight_green%28highlight_green%287%287+%2B+sqrt%2842%29%29%29%29