How to simplify 3A's square + 5A's square + b-ab Good answer, additional points! Given that A.B is the root of two real number solutions of equation 3x + 4x-7 = 0, find the value of 3A's square + 5A + b-ab

How to simplify 3A's square + 5A's square + b-ab Good answer, additional points! Given that A.B is the root of two real number solutions of equation 3x + 4x-7 = 0, find the value of 3A's square + 5A + b-ab

3a^2+5a+b-ab
=3a^2+4a-7+a+b-ab+7
=(a+b)-ab+7
=-4/3+7/3+7
=8