Question

46. Calcule os produtos.
a) (x + 3x – 4)(x - 2)
b) (c + 4c? + c) • (0 - 1)
c) (-y+y- 3) -y+ 1)
d) (x3 - 2x + x + 1)(x - 1)
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Answer 1

a)(x+3x-4)(x-2)

=(4x-4)(x-2)=4x²-8x-4x+8=

=4x²-12x+8

b)(c + 4c + c) • (0 - 1)=

=6c (-1)=-6c

c) (-y+y- 3) (-y+ 1)=-3 (-y+1)

=3y-3

d) (x³ - 2x + x + 1)(x - 1)

=(x³-x+1)(x-1)=x⁴-x³-x²+x+x-1

=x⁴-x³-x²+2x-1