Question

Me ajudem vale nota
1:resolva
a)(+8x)+(-3x)=
b)(-5x)-(-11x)=
c)(-6y)+(-y)=
d)(+7y)-(+7y)=

2:calcule
a)(+5×).(-4x tem2emcima)=
b)(-2x).(+3x)=
c)(+5x).(+4x)=
d)(-n).(+6n)=

Answer 1

a)(+5×).(-4x^2)= - 20x^3

b)(-2x).(+3x)= - 6x^2

c)(+5x).(+4x)= + 20x^2

d)(-n).(+6n)= - 6n^2