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9 June, 16:48

The function f is defined by f (x) = x^2+7x-18.

Part A: If (g) = f (4x), then g (x) = ax^2+bx+c. Determine the values for a, b, c.

a=

b=

c=

Part B: Determine the positive zero of g (x) and select the correct answer below.

A. 1/2

B. 7/4

C. 9/4

D. 5/2

+2
Answers (1)
  1. 9 June, 17:14
    0
    If g (x) = f (4x) then:

    g (x) = 16x^2+28x-18

    a, b, c are 16,28,-18 respectively

    using the quadratic equation we find x=1/2 and - 2.25

    A. 1/2
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