Question

What is (a+b)^-2 ??
How to expand it?

Answer 1

${(a + b})^{ - 2}$

$\frac{1}{ {(a + b)}^{2} } \\ \frac{1}{ {a}^{2} + 2ab + {b}^{2} }$

Formula used is

a^-1 = 1/a

Answer 2

Answer:

here's answer

1/(a sq + b sq + 2ab )