•X²+5X=-6
•X²=4X-3
•X²+6=7X
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a x²+5x=-6
x²+5x+6=0
(x+3)(x+2)=0
x+3=0 x+2=0
x=-3 x=-2
b x²=4x-3
x²-4x+3=0
(x-3)(x-1)=0
x-3=0 x-1=0
x=3 x=1
c x²+6=7x
x²-7x+6=0
(x-6)(x-1)=0
x-6=0 x-1=0
x=6 x=1
x²+5x+6=0
(x+3)(x+2)=0
x+3=0 x+2=0
x=-3 x=-2
b x²=4x-3
x²-4x+3=0
(x-3)(x-1)=0
x-3=0 x-1=0
x=3 x=1
c x²+6=7x
x²-7x+6=0
(x-6)(x-1)=0
x-6=0 x-1=0
x=6 x=1
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