Question 543570: 2x^2+x=-1
Answer by IFY(62)   (Show Source):
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2x^2+x=-1
FIRST OF ALL TRY 2 PUT 1 INTO THE LEFT HAND SIDE IN ORDER TO BE FACTORIZED
2X^2 +X +1 = 0
2X ( X + 1) - 1 (X +1 ) = 0
(X +1) (2X - 1)
X + 1= 0 , 2X - 1 = O
X = -1 , 2X = 1... DIVIDE BOTH SIDES BY 2
X = - 1 , X = 1/2
X = - 1 OR 1 / 2
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