Question

please help me ..
Here is my question..
please fastly..​

Answer 1

$x = \frac{2ab}{ {b}^{2} + 1} \\ x \times {b}^{2} + x = 2ab$
a bit hard but I tried you continue

Answer 2

Answer:

b/2

Step-by-step explanation:

Identities used :

(a+b)^2 = a^2 + b^2 + 2 ab

(a-b)^2 = a^2 + b^2 - 2 ab

a^2 - b^2 = (a+b)(a-b)

Properties used :

Rationalization in first step.