Question

(3x-7)(3x+4) solve using identities ​

Answer 1

$Answer \:$

Formula :

(m+a)(m+b) = (m)² + m(a+b)+ab

Solution :

(3x-7)(3x+4)

= (3x)²+3x(-7+4)+(-7×4)

=9x²+3x(-3)+(-28)

=9x²-9x-28

Therefore, The answer is 9x²-9x-28