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Which of the following equations are quadratic equations? I) x2 + 4x + 23 = x + 33 / 28 II) 2x2 / 3 + 6x + 2 = x2 + 8 III) 6x2 + 4x + 18 = 6x2 - 6x

Which of the following equations are quadratic equations? I) x2 + 4x + 23 = x + 33 / 28 II) 2x2 / 3 + 6x + 2 = x2 + 8 III) 6x2 + 4x + 18 = 6x2 - 6x Correct Answer I & II

Since in equation III coefficient of x2 is same in L.H.S and R.H.S and will cancel out each other so, it cannot be Quadratic equation

So, equation I and equation II are Quadratic equation 

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