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The equation above is already in its simplest form. If you want to expand the brackets there's the guide below. Step by step guide: X(X-2)(9+2X)= 45 [latex] (x^{2} +2x) (9+2x)=45[/latex] [latex]9x^2+2x^3+18x+4x^2=45[/latex] [latex]9x^2+2x^3+18x+4x^2-45=0[/latex]
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