Question

Factorise:-8(a+3b)^2 -18(a-3b)^2Factorise:-8(a+3b)^2 -18(a-3b)^2

Answer 1

-8(a+3b)^2 -18(a-3b)^2

=-8(a+3b)^2 +18(3b-a)^2

=(-8+18) (a+3b)^2

=10(a+3b)^2

Answer 2

Answer:

=−26a^2+60ab−234b^2