Question

Using a suitable identity, find the value of (32 − 5) (32 + 4)

Answer 1

Answer:

972

Step-by-step explanation:

(x+a)(x+b) = x²+(a+b)x+ab

(32-5)×(32+4)= 32²+(-5+4)×32+(-5×4)

= 1024+(-1)×32+(-20)

=972