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Math help?

$x^2-10x+c$

1 Answer

Oct 26, 2016

$x = -5+-sqrt(25-c)$

Explanation:

Completing the square , we have

$x^2+10x+c = 0$

$=> x^2+10x = -c$

$=> x^2+10x + 25 = 25-c$

$=> (x+5)^2 = 25-c$

$=> x+5 = +-sqrt(25-c)$

$:. x = -5+-sqrt(25-c)$

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