Diketahui f(x) = 3x dan g(x) = x²+2x-7 Tentukan (f × g) (-3)
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f(x) = 3x
g(x) = x² + 2x - 7
f x g(x) = f(x) x g(x)
= 3x x x^2+2x-7
= 3x^3 + 6x^2 - 21x
(f x g) (-3) = 3(-3)^3 + 6(-3)^2 - 21(-3)
= -81 + 54 + 63
= 36
nilai (f x g) (-3) = 36