Question

The expression 2a(b²-1) -4ab²(9+2) can also be written as?

Answer 1

$2a(b^2-1)-4ab^2(9+2)$

$=2ab^2-2a-4ab^2(11)$

$=2ab^2-2a-44ab^2$

$=-2a-42ab^2$

$=-2a(1+21b^2)$