Which of the following is not quadratic equation?
1.(x-1)2 = 3х2 +х - 2
2.3х - x2 = х2 +5
3.(х + 2)2 = 2(x2 - 5)
4.(V2 x+3)2 = 2х2 + 6
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1,2,3 iS youR AnSweR (quAdRic equATion)
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