Question 479177
x^2-4x=8
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a = 1
b = -4
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c = (b/a)^2 = 4
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{{{x^2-4x=8}}}
{{{x^2 - 4x + 4 = 12}}}
{{{(x - 2)^2 = 12}}}
{{{x - 2 = sqrt(12)}}}
{{{x = 2 + 2sqrt(3)}}}
and
{{{x = 2 - 2sqrt(3)}}}