2x^2+13x-7=0
D=169+56=225
x=-13+15/4=1/2
x=-13-15/4=-7
2x^2+13x-7=2(x-1/2)(x+7)
2x^2+13x-7=0D=169+56=225x=-13+15/4=1/2x=-13-15/4=-7
2x^2+13x-7=0
D=169+56=225
x=-13+15/4=1/2
x=-13-15/4=-7
2x^2+13x-7=2(x-1/2)(x+7)
2x^2+13x-7=0
D=169+56=225
x=-13+15/4=1/2
x=-13-15/4=-7