Question

(3a-4b-3c)^2 pls do this

Answer 1

Step-by-step explanation:

=(3a)^2+(-4b)^2(-3c)^2+2×3a×-4b+2×-4b

×-3c+2×-3c×3a

=9a^2+16b^2+9c^2-24ab+24bc-18ac