Add 2x^2+4x-4and-x
^2-x+3
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Answer:--
x^2+3x-1
explanation:--
2x^2+4x-4+(-x^2-x+3)
2x^2+4x-4-x^2-x+3)
2x^2-x^2+4x-x-4+3
x^2+3x-1
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