Quadratic Equations Q2 — Class 10 Maths Solution

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Maths Quadratic Equations Medium

Which of the following is not a quadratic equation?

(a) $2 (x - 1)^{2} = 4 x^{2} - 2 x + 1$
(b) $2 x - x^{2} = x^{2} + 5$
(c) $(2 x + 3)^{2} + x^{2} = 3 x^{2} - 5 x$
(d) $(x^{2} + 2 x)^{2} = x^{4} + 3 + 4 x^{3}$

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