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Question

Out of the given equations, is not a quadratic equation.

A
x25x=6
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B
(x + 2)2 = x2
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C
x22=0
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D
5t23t+7=5
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Solution

The correct option is B (x + 2)2 = x2
A quadratic equation is of form ax2 + bx + c = 0,where a 0.when we simplify the equation (x + 2)2 = x2, it will become 4x + 4 = 0,which is not a quadratic equation.

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