Question

1) Desenvolva e simplifique :

a) -2(x-3)+(-5x+)
b) 3x(-x-1)-2(x²+x)
c) (2x-1) (3x+2)
d) (x-1) (x²+x+1)
e) (x+y+z) – ( x-y+z) + (x+y-z) – ( y+z-x)

Answer 1

a) -2(x-3)+(-5x+1)=
-2x+6-5x+1=
-3x+7

b) 3x(-x-1)-2(x²+x)
-3x²-3x-2x²-2x
-x²-x

c) (2x-1)(3x+2)
6x²+4x-3x-2
6x²+x-2

d) (x-1)(x²+x+1)
x³+x²+x-x²-x-1
x³-1

e) (x+y+z) -(x-y+z) +(x+y-z) -(y+z-x)
x+y+z-x+y-z+x+y-z-y-z+x
2x+2y-2z