Question

If 3a-2b = 4 ab=5
then, (3a+2b)^2 : ?​

Answer 1

(3a+2b)^2=(3a-2b)^2+(4×3a×2b)

= (4)^2+24ab

=16+(24×5)

= 16+120

= 136

By the formula, (a+b)^2=(a-b)^2+4ab