Diketahui f(x) = x² - 5x + 1 dan g(x) = x+ 5. Komposisi fungsi (fog) (x)

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f(x)=x^2-5x+1
g(x)=x+5
fog(x)=f(g(x)
=f(x+5)
=(x+5)^2-5(x+5)+1
=x^2+10x+25-5x-25-1
=x^2+5x+1