Work Step by Step
Substitute $8$ in for $x$ to obtain: $=8^2-7\cdot 8 +4$ Apply the exponent first to obtain: $=64-7\cdot 8+4$ Perform multiplication next: $=64-56 + 4$ Perform subtract first and then addition: $=8 + 4 \\=12$
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.