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11 February, 05:20

If G (x) = (x + 5) 2, and F (x) = x2 + 9x, what is the function G (F (x)) ?

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  1. 11 February, 05:32
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    Hello,

    f (x) = x²+9x

    g (x) = (x+5) ²

    g (f (x)) = g (x²+9x) = ((x²+9x) + 5) ² = (x²+9x+5) ²=x^4+81x²+25+2*x²*9x + 2*x²*5 + 2*9x*5

    =x^4+18x^3+91x²+90x+25
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