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tatyana61 [14]
3 years ago
8

What is f(g(x)) when f(x) = x2 + 5, and g(x) = 10 - 5x?

Mathematics
1 answer:
Mashutka [201]3 years ago
5 0

Answer:

D

Step-by-step explanation:

To obtain f(g(x)) substitute x = g(x) into f(x), that is

f(10 - 5x)

= (10 - 5x)² + 5 ← expand (10 - 5x)²

= 100 - 50x - 50x + 25x² + 5 ← collect like terms

= 25x² - 100x + 105 → D

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