Question

(3x+4)(3x-5) use suitable identities​

Answer 1

We have to use identity 4 (x+a)(x+b)=x2+(a+b)x+ab

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

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

here x=3x a=4 and b=-5

=3x2+{4+(-5)}+4×(-5)

=9x2-1-20

mark as brainliest please

Answer 2

Answer:

Hope it helps you...................