Question

(x+a) (x+b) = x^2 +(a+b)x+ab to find the following products (3x+4) (3x-5)​

Answer 1

Answer:

9x^2 -3x -20

Step-by-step explanation:

(x+a) (x+b) = x^2 +(a+b)x+ab

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

here

x=3x

a=4

b= -5

(3x+4) (3x-5)= (3x)^2+(4-5)3x +4(-5)

=9x^2 -3x -20