Explicación paso a paso:
x²-2x-3=0
x²+x-3x-3=0
x(x+1)-3(x+1)=0
(x+1)×(x+3)=0
x+1=0
x-3=0
x=-1
x=3
x¹=-1, x²=3
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Explicación paso a paso:
x²-2x-3=0
x²+x-3x-3=0
x(x+1)-3(x+1)=0
(x+1)×(x+3)=0
x+1=0
x-3=0
x=-1
x=3
x¹=-1, x²=3