me ajude e urgente !!!
consider f(x)=5x+2 e g(x)=x(ao quadrado)-2x+1 calcule:
a)fog(-1)
b)gof(-2)
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Olá, Loueslenne.
![f(x)=5x+2,g(x)=x^2-2x+1\Rightarrow\\\\f\circ g(x)=5g(x)+2=5x^2-10x+7\\\\
g\circ f(x)=[f(x)]^2-2f(x)+1=(5x+2)^2-2 (5x+2)+1\\\\](https://tex.z-dn.net/?f=f%28x%29%3D5x%2B2%2Cg%28x%29%3Dx%5E2-2x%2B1%5CRightarrow%5C%5C%5C%5Cf%5Ccirc+g%28x%29%3D5g%28x%29%2B2%3D5x%5E2-10x%2B7%5C%5C%5C%5C%0Ag%5Ccirc+f%28x%29%3D%5Bf%28x%29%5D%5E2-2f%28x%29%2B1%3D%285x%2B2%29%5E2-2+%285x%2B2%29%2B1%5C%5C%5C%5C%0A "f(x)=5x+2,g(x)=x^2-2x+1\Rightarrow\\\\f\circ g(x)=5g(x)+2=5x^2-10x+7\\\\
g\circ f(x)=[f(x)]^2-2f(x)+1=(5x+2)^2-2 (5x+2)+1\\\\")
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