Question

7-square root of 5 / 7+square root of 5

Answer 1

multiply and divide by conjugates

Answer 2

can u walk me trhoguh it

Answer 3

yes

Answer 4

7-(5)½ 7-(5)½
------ * ------- [multiply both numerator and denominator
7+(5)½ 7-(5)½ by the conjugate of denominator]

Answer 5

conjugate of (a + b) is (a-b)

Answer 6

now in denominator use formula (a+b)(a-b)= (a²-b²)

Answer 7

and in numerator use formula (a-b)(a-b)=(a-b)²

Answer 8

then simplify

Answer 9

This is the standard procedure for solving such problems