Question

Solve:$6+7b-3b^2$

Answer 1

$6+7b-3b^2=0\Rightarrow -[3b^2-7b-6]=0\Rightarrow -(3b^2-9b+2b-6)=0\Rightarrow -(3b+2)(b-3)=0\Rightarrow b=\frac{-2}{3}orb=3$