Question

Out of the following equations which one is not a quadratic equation ?
(A) x²+4x=11+x²
(B) x²=4x
(C)5x²=90
(D) 2x-x²=x²+5

Answer 1

Hi ,

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We know that ,

any Equation which has degree 2 is called

quadratic equation.

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A ) x² + 4x = 11 + x²

4x = 11

degree = 1

not a quadratic equation.

B ) x² = 4x

divide both sides with x , we get

x = 4

degree = 1

not a quadratic equation.

C ) 5x² = 90
degree = 2

quadratic equation.

D ) 2x - x² = x² + 5

2x = 2x² + 5

degree = 2

quadratic equation.

Therefore ,

Option ( A ) , and ( B) are not quadratic

equations.

I hope this helps you.
: )

Answer 2

Answer:

x2 =4x

Step-by-step explanation:

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