Question

find the product of (×+3) (×+7 )​

Answer 1

Answer:

it is x(x+7)+3(x+7)

=x^2+7x+3x+21

=x^2+10x+21

Answer 2

$(x + 3)(x + 7) \\ = x(x + 7) + 3(x + 7) \\ = {x}^{2} + 7 x + 3x + 21 \\ = {x}^{2} + 10x + 21$