Dik: f(x)=5x+3
g(x)=2x-4
h(x)=x²+2x
Dit:a. f(x)+g(x)
b. g(x)+h(x)
c. g(x)-h(x)
d. f(x) x g(x)
e.g(x) x h(x)
g(x)=2x-4
h(x)=x²+2x
Dit:a. f(x)+g(x)
b. g(x)+h(x)
c. g(x)-h(x)
d. f(x) x g(x)
e.g(x) x h(x)
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b. 2x-4+x^2+2x = x^2+4x-4
c. 2x-4-(x^2+2x) = 2x-4-x^2-2x
=-x^2-4
d. (5x+3)(2x-4) = 10x^2-20x+6x-12
=10x^2-14x-12