Question

multiply ((x+3) (x+4)​

Answer 1

Answer:

By using (x+a) (x+b)=x²+(a+b)x+ab

(x+3) (x+4) =x²+(3+4)x+3×4

(x+3) (x+4)= x²+7x+12

another process

(x+3)(x+4)=x²+4x+3x+12=x²+7x+12

Answer 2

Answer:

$x(x + 4) + 3(x + 4) \\ {x}^{2} +4x + 3x + 12 \\ = {x}^{2} + 7x + 12$