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simplify m(z+9)-m(z) using m(z)=z^2

Guest Oct 6, 2016

1⁺⁰ Answers

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$m(z+9) - m(z) ; m = z^2\\ = (z + 9)^2 - z^2\\ = z^2 + 18z + 81 - z^2\\ = 18z + 81$

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MaxWong Oct 6, 2016

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