If f(x) = x2-4x+2 and g(x)=3x-7 then find fog(x) ?
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f0g(x)=f(g(x))
=f(3x-7)
=3x-7^2-4(3x-7)+2
=9x^2+49-42x-12x+28+2
=9x^2-54x+79
=f(3x-7)
=3x-7^2-4(3x-7)+2
=9x^2+49-42x-12x+28+2
=9x^2-54x+79
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