Question

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

Answer 1

C) 5x = 90 is not a quadratic equation.

Answer 2

Option (a), (b) and (c) area not quadratic equation.

Step-by-step explanation:

To find : Out of the following equation which one is not a quadratic equation ?

Solution :

Quadratic equation is in form of $ax^2+bx+c=0$ or an equation which has degree 2.

Now in the given options,

A) $x^2+4x=11+x^2$

Solving equation further,

$4x=11$

It is not a quadratic equation as degree is 1.

B) $x^2=4x$

Divide both sides with x,

$x=4$

It is not a quadratic equation as degree is 1.

C) $5x=90$

It is not a quadratic equation as degree is 1.

D) $2x-x^2=x^2+5$

Take like terms together,

$2x^2-2x+5=0$

It is a quadratic equation as degree is 2.

Therefore, option (a), (b) and (c) area not quadratic equation.

#Learn more

Find the value of p, for which one of the quadratic equation

https://brainly.in/question/1143922