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OpenStudy (anonymous):
When solving x2 - 4x = -7 by completing the square what value is added to both sides of the equation?
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OpenStudy (anonymous):
Can you tell me what is the coefficient of x here??
OpenStudy (anonymous):
you add 2 on both sides. 2ab= 2*x*2 a=x b=2
OpenStudy (anonymous):
a^2 - 2ab + b^2 = (a-b)^2
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