Answer
$15y^{2}-27y+30$
Work Step by Step
We use the distributive property and combine like terms:
$9(y^{2}-3y+4)-6(1-y^{2})
=9y^{2}-27y+36-6+6y^{2}
=15y^{2}-27y+30$
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.