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Solnce55 [7]
3 years ago
12

Don't get #15. Cam someone help me

Mathematics
1 answer:
WITCHER [35]3 years ago
6 0
15) Function notation:
f(x) = x² - 5x +8

16) f(2) , means you have to replace x by 2
f(2) = 2² - 5(2) + 8 = 4-10+8  and f(2) = 2

17) f(x) = 8 , means : 8 = x² - 5x +8

Simplify x² - 5x = 0
Factorize x² - 5x = 0 → x(x - 5) = 0, then the valueS of x are:
x = 0   and x = 5

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