# Math Help - Solving quadratic finctions; plz help me solve for x

1. ## Solving quadratic finctions; plz help me solve for x

Equation: (x+7)(x+2)=84

2. Originally Posted by runner940
Equation: (x+7)(x+2)=84
ohh, i think i can help

$(x+7)(x+2)=84$
$x^2+14+9x-84=0$
$x^2+9x-70$
factors of 70 that add up to 9: 14, -5
$(x+14)(x-5)=0$
$x=5$ or $x=-14$