Calcula el valor de la operación
R = (x - 1)(x + 2) - (x+3)(x-4)
A)0
B)2x + 10
C)x + 10
D)2x + 5
E)2x - 10
R = (x - 1)(x + 2) - (x+3)(x-4)
A)0
B)2x + 10
C)x + 10
D)2x + 5
E)2x - 10
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Respuesta:
R = (x - 1)(x + 2) - (x+3)(x-4)
= x² + x - 2 - (x + 3) .(x-4)
=2x+10
rpta: alternativa e)