Question

Can someone solve this ? thank you !

Answer 1

Explanation:

14)

`(3)/(√(7))=(3*√(7))/(√(7)*√(7))\\\\=(3√(7))/(7)`

15a)

`(5)/(√(2))=(5*√(2))/(√(2)*√(2))\\\\=(5√(2))/(2)\\`

b)(x + y)² - (x - y)² = 4xy

(2 + √3)² - (2 -√3)² = 4* 2 * √3

= 8√3