Question

( a+b )² - ( a-b ) = ??

Answer 1

Verified answer

Ijinkan saya coba bantu jawab

--> (a + b)² - (a - b)
= a² + 2ab + b² - a + b
= -a + a² + b + b² +2ab
= - a (1 - a) + b (1 - b) + 2ab