Question

Use appropriate formula to compute $107\times 93$

Answer 1

Using the identity $(a+b)(a-b)$=$a^2-b^2$
We can write: $107=100+7$ and $93=100-7$
after using formula we get: $(100+7)(100-7)$ = ${100}^2-7^2$ $=10000-49$ $=$ $9951$
Hence the answer is $9951$