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how to solve quadratic equation


label Algebra
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x squared -4x=-4 how would you solve this?

Jul 3rd, 2014

x^2-4x=-4

x^2-4x+4=0

(x-2)(x-2)=0

Thus, there is only one solution: x=2

I did this by inspection, but you could also use the quadratic formula (please message me if you'd like to learn more about that).

Jul 3rd, 2014

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Jul 3rd, 2014
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Jul 3rd, 2014
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