Question

By using identify evaluate (100+7)(100-7)

Answer 1

(a+b)(a-b)=(a^2-b^2)=100^2- 7^2=10000-49=9951

Answer 2

(100+7) (100-7)

(a-b) (a+b)= a^2 -b^2

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

10000- 49

= 9951 is ur answer