Question

using suitable identities,evaluate 105*107

Answer 1

(100+5)(100+7) = 100^2 + (5+7)100 + 7×5
= 10000+1200+35
11235
Answer

Answer 2

105*107=
Can be solved in this way:
(x+a)(x+b)=x^2+{a+b)x+ab
100^2+(5+7)100+(5)(7)
10000+1200+35=
11235