Respuesta:
(x+9)(x-4)+(x+8)(x-5)-2(x+8)(x+7)
(x+5)+(x+8)(x-5)-2(x+8)(x+7)
(x+13)-2x+8(x+7)
x+21(x+7)
x+28
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Respuesta:
(x+9)(x-4)+(x+8)(x-5)-2(x+8)(x+7)
(x+5)+(x+8)(x-5)-2(x+8)(x+7)
(x+13)-2x+8(x+7)
x+21(x+7)
x+28