Question

which of the following is not a
quadratic equation ?
$x - 3x = 4 \\ 3x - 5x = x ^{2} \\ x + 1x = 4 \\ x^{2} - 3 = 4x ^{2} - 4x$
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Answer 1

Answer:

Question number 1 and 3 is not a quadratic equation.

Step-by-step explanation:

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