Respuesta:
x=5,3
plis corazoncito y coronita
Explicación paso a paso:
x^2+8x−3x−12=21x−42
x^2+5x−12=21x−42
x^2+5x−12−21x+42=0
2x^2−16x+30=0
2(x^2−8x+15)=0
2(x−5)(x−3)=0
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Respuesta:
x=5,3
plis corazoncito y coronita
Explicación paso a paso:
x^2+8x−3x−12=21x−42
x^2+5x−12=21x−42
x^2+5x−12−21x+42=0
2x^2−16x+30=0
2(x^2−8x+15)=0
2(x−5)(x−3)=0
x=5,3