cheyboo6
cheyboo6 cheyboo6
  • 20-05-2017
  • Mathematics
contestada

Let f(x) = 2x2 + x − 3 and g(x) = x − 1. Find f(x) • g(x).
a. x2 − 4x + 3
b. 2x3 − 4x2 + 3
c. 2x3 − x2 + 4x − 3
d. 2x3 − x2 − 4x + 3

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BHmohammad
BHmohammad BHmohammad
  • 20-05-2017
(2x^2 +x-3) (x-1)
= (2x^2 +x-3)*x +(2x^2 +x-3)*(-1)
= 2x^3 +x^2 -3x -2x^2 -x +3
=2x^3 +x^2 -2x^2 -3x-x +3
= 2x^3 -x^2 -4x +3

the answer is d
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