Work Step by Step
RECALL: $a^2 + 2ab + b^2=(a+b)^2$ The given trinomial can be written as: $=z^2 + 2(z)(7y) + (7y)^2$ Factor the trinomial using the formula above with $a=z$ and $b=7y$ to have: $=(z+7y)^2$
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.