6x^2+9x-6=06x2+9x−6=0
"solution 1:"solution 1:
"factor the equation :"factor the equation :
3(x+2)(2x-1)=03(x+2)(2x−1)=0
"if " x+2=0" ; "x=-2if x+2=0 ; x=−2
"if "2x-1=0" ; "2x=1" ; "x=1/2if 2x−1=0 ; 2x=1 ; x=12
"solution 2:"solution 2:
"use quadratic formula"use quadratic formula
ax^2+bx+c=0ax2+bx+c=0
6x^2+9x-6=06x2+9x−6=0
a=6" ; "b=9" ; "c=-6a=6 ; b=9 ; c=−6
Delta=sqrt(b^2-4*a*c)
Delta=sqrt(9^2+4*6*6)
Delta=sqrt(81+144)
Delta=sqrt(225)
x_1=(-9-sqrt(225))/(2*6)=(-9-15)/12=-24/12=-2
x_2=(-9+sqrt 225)/(2*6)=(-9+15)/12=6/12=1/2