Answer:
f(- 3x) = 36x² - 9x - 7
Explanation:
given
f(x) = 4x² + 3x - 7
to evaluate f(- 3x), substitute x = - 3x into f(x)
f(- 3x)
= 4(- 3x)² + 3(- 3x) - 7
= 4(9x²) - 9x - 7
= 36x² - 9x - 7
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