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24 February, 09:58

Let f (x) = x^2 - 2x

a. Find and simplify f (5)

b. Find the value of x such that f (x) = 3

+1
Answers (1)
  1. 24 February, 11:40
    0
    A) f (5) = 5^2 - 2•5 = 25-10=15

    b) x^2 - 2x-3=0

    (x-3) (x+1) = 0 so

    x=3 and x=-1 are the solutions
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