Question

Find that product of (3x+5) (3x_4)

Answer 1

Answer:

$( 3x + 4)(3x + 3) \\ = {3x}^{2} + 3x(4 + 3) + 4 \times 3 \\ = 9 {x}^{2} + 3x(7) + 12 \\ = 9 {x}^{2} + 21x + 12$

Answer 2

Answer:

(3x+5)(3x-4)

=3x(3x-4)+5(3x-4)

=9x^2-12x+15x-20

=9x^2+3x-20