|x^2+x+1|+|2x+3|=4x.
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Step-by-step explanation:
|x^2+x+1|+|2x+3|=4x.
-x^2 -x-1 -2x -3 = 4x
-x^2 -3x -4 = 4x
x^2 +3x + 4x +4
x^2 +7x +4 =0
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