Question

Using the identity, evaluate 93 * 109​

Answer 1

100+7)*93

100×93+7×93

9300+651

9951

Answer 2

Step-by-step explanation:

93×109

(100-7)(100+9)

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

put x=100

put a=-7.

put b=9

(100+(-7))(100+9)=100^2+100(-7+9)+(-7)*9

=10000-700+900-63

=10000+200-63

=10200-63

=10137