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2014-11-25T18:16:32+08:00

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X²+2x-12=0
x²+2x=12
x²+2x+1=12+1
(x+1)²=13
x+1=posineg√13
x=posineg√13-1

Hope this helps
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2014-11-25T18:29:49+08:00
Addition and Subtraction of Polynomials
    2x-8+x^2-4
In the given equation above, you must add or/and subtract polynomials with same variable and exponent from left to right. Hence,
   2x+x^2-8-4 is equals to   2x+x^2-12
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