Question

what's the answer for this???​

Answer 1

=6a^2+3b^2-ab-(8ab-5b^2-3a^2). =6a^2+3b^2-ab-8ab+5b^2+3a^2. =(6a^2+3a^2)(3b^2+5b^2)(-ab-8ab). =9a^2+8b^2-9ab