Question

solve by expanding brackets 109+107 ​

Answer 1

(107)×(109)

(100+7)(100+9)

Using the identity

(x+a)(x+b)

x(x+b)+a(x+b)

=x²+xb+ax+ab

=x²+(a+b)x+ab

Here,

x=100

a=7

b=9

So,

=(100)²+(7+9)100+(7×9)

=10000+1600+63

Answer=11,663

I hope it may help you!