Question

Write the expansion formula of
(a+b)^2 (a-b)^2​

Answer 1

• $\bf{(a\:+\:b)}^{2}$

$\:\:\:\:\:\:\:\leadsto\sf{\:a}^{2}\:{+\:b}^{2}\:{+\:2\:ab}$

${ }$

• $\bf{(a\:-\:b)}^{2}$

$\:\:\:\:\:\:\:\leadsto\sf{\:a}^{2}\:{+\:b}^{2}\:{-\:2\:ab}$

Answer 2

(a+b)²=a²+b²+2ab

(a²-b²)=a²+b²-2ab