Question

Using identity : (3x + 5) (3x - 1)​

Answer 1

Answer:

Using 4th identity

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

=(3x+5)(3x-1)

=(3x)^2+(5-1)3x+(5)(-1)

=9x^2+(4)3x+(-5)

=9x^2+12x-5