Question

Which of the following is not quadratic equation?

 X²+ 4 x  = 11 + x ²

 X ² = 4x

 5X ² = 90

2 x - x² = x² + 5​

Answer 1

" 5X ² = 90

.As it is not in the form of ax²+bx + c .

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Answer 2

Answer:

5x2 = 90

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