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Multiplicar
1° parte numérica
2° parte literal
No olvides la regla de signos
a)
2a(b - a)
= 2ab - 2a^2
b)
(a - 3ab)b
= ab - 3ab^2
c)
2xy(x + 3y - x^2)
= 2x^2y + 6xy^2 - 2x^3y
d)
x^2(1 + 2x - y^2)
= x^2 + 2x^3 - x^2y^2