Question

using suitable identities solve (7z+3y) (7z+3y).​

Answer 1

Answer:

Explanation: (7z+3y)(7z+3y)

=(7z+3y)²

Here, we can apply the identity (a+b)²=a²+2ab+b²

So, (7z+3y)²= (7z)²+2(7z×3y)+(3y)²

= 49z²+42zy+9y²

Hope it helps.

Have a nice day :)