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## anonymous 4 years ago Solve the equation: x2 - 12x = -36

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1. Mimi_x3

$x^2-12x+36$ $$a=1,b=-12,c=36$$ then use the quadratic formula $x=\frac{-(b)\pm\sqrt{(b)^{2}-4(a)(c)}}{2a}$

2. Mimi_x3

$$x^2-12x+36=0$$*

3. anonymous

it's factorable -6,-6 =P

4. anonymous

Why can;t we just factor this by the way?? :o $$x^2 - 6x - 6x +36$$ $$=x(x-6)-6(x-6)$$ $$=(x-6)^2$$

5. Mimi_x3

yeah lol. $$x^2-12x=-36$$ => $$x^2-12x+36$$ $$a+b= -6+-6$$ $$a*b=6*6$$ you can justuse the quadratic formula anyway; its faster.

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