Question

(3x+7y)² find the product of the following using identity (a+b)²=2+2ab+b² step by step method​

Answer 1

${(3x + 7y)}^{2} \\ = {(3x)}^{2} + {(7y)}^{2} + 2(3x)(7y) \\ = {9x}^{2} + {49y}^{2} + 42xy$

Hope this helps.

Thanks.