zaylelangaigne2006
17.10.2020 •
Mathematics
If c(x) = 4x – 2 and d(x) = x2 + 5x, what is (cd)(x)?
4x3 + 18x? – 10x
x² +9x-2
16x2 + 4x - 6
4x2 + 20x - 2
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Ответ:
(x^2)/2 = 18
x^2 = 36
Because there is no square root, x can be positive and negative.
The answer would be 6 and -6.