x2+7x+12=0 by completing squares
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Step-by-step explanation:
x2 + 2*x*7/2 +49/4 -49/4 +12=0
(x+7/2)^2 = (49-48)/4
x + 7/2= plusminus 1/2
i) if x + 7/2= 1/2
then x = -3
ii) if x + 7/2 =-1/2
then x = -4
Hope this helps!
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