given f(x) = -3x+7 and g(x) = 2x²-8 find g(f(x))
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Answer:
18x² - 84x + 90
Explanation:
Given
f(x) = - 3x + 7 and g(x) = 2x² - 8
g(f(x))
= 2 (f (x))² - 8
= 2 ( - 3x + 7 )² - 8
= 2 ( 9x² - 42x + 49 ) - 8
= 18x² - 84x + 98 - 8
= 18x² - 84x + 90
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