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M2 + 8m + 15
(+3) (+5)=15
3+5= 8
(X+3) (x+5)
X2 5x
3x 15
——————-
X2. 8x. 15
X+8=0
X=0-8
X=-8.
X+15=0
X=0-15
X=-15
RESPUESTA FINAL
x= -8. X= -15