Question

Select a suitable identity and find the following products.
$(3k + 4l)(3k + 4l)$

Answer 1

we will use identity
(a+b)² = a²+2ab +b²

(3k+4l)²= (3k)²+ 2×3k×4l +(4l)²

(3k+4l)²=9k²+24kl+16l²

9k²+24kl+16l²