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horrorfan [7]
3 years ago
7

Find (H*F) (x) if h(x)=5-x and f(x)=3x+2 Please explain

Mathematics
1 answer:
Juli2301 [7.4K]3 years ago
4 0
H(x) = 5 - x
Domain: Df = R

f(x) = 3x + 2
Domain: Df = R

Dh = Df therefore (h·f)(x) = h(x) · f(x)

(h·f)(x) = (5 - x)(3x + 2) = 5(3x + 2) - x(3x + 2) = 5·3x + 5·2 - x·3x - x·2

= 15x + 10 - 3x² - 2x = -3x² + 13x + 10
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