Work Step by Step
Since $93=100-7$ and $107=100+7$, then $93 \times 107 = (100-7)(100+7)$. Use the formula $(a-b)(a+b)=a^2-b^2$ with $a=20$ and $b=2$ to obtain: $=100^2-7^2 \\=10,000-49 \\=9,951$
You can help us out by revising, improving and updating this answer.Update this answer
After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.