Question

(3c - d)² + d(5c - d)​

Answer 1

9c^2-cd

Explanation:

(3c-d)^2+d(5c-d)

(3c-d)(3c-d)+5cd-d^2

9c^2-3cd-3cd+d^2+5cd-d^2

9c^2-6cd+5cd

9c^2-cd