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Factorise 84-2x-x^2

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Factorise 84-2x-x^2

Posted by Ayush Bhardwaj 6 years, 10 months ago

Ram Kushwah 6 years, 10 months ago

{tex}\style{font-size:10px}{\begin{array}{l}84-2x-2x^2\\=-2(x^2+x-42)\\=-2(x^2+7x-6x-42)\\=-2\{x(x+7)-6(x+7)\}\\=-2(x+7)(x-6)\end{array}}{/tex}

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