Answer
$64x^{2}+48x+9$
Work Step by Step
Step 1: $(8x+3)^{2}=(8x+3)(8x+3)$
Step 2: $8x(8x+3)+3(8x+3)$
Step 3: $8x(8x)+8x(3)+3(8x)+3(3)$
Step 4: $64x^{2}+24x+24x+9$
Step 5: $64x^{2}+48x+9$
You can help us out by revising, improving and updating this answer.
Update this answerAfter 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.