Question

Class10 -math


WHICH OF THE FOLLOWING IS NOT A QUADRATIC EQUATION?
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Answer 1

Answer:

C is not a Quadratic Equation as it has highest power 3 therefore it is a cubic equation

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Answer 2

Option (C)

Step-by-step explanation:

Given :-

a)ax²+bx+c = 0 , a≠0

b)3x²+2x+1 = 0

c)3x³+2x²+1 = 0

d)x²+1 = 0

To find :-

Which of the following is not a quadratic equation.?

Solutions:-

a)

Given equation is ax²+bx+c = 0 , a≠0

It is a quadratic equation.

Reason :-

The degree of the given equation is 2.

b)

Given equation is 3x²+2x+1 = 0

It is a quadratic equation.

Reason :-

The degree of the given equation is 2.

c)

Given equation is 3x³+2x²+1 = 0

It is not a quadratic equation.

Reason :-

The degree of the given equation is 3.

It is a Cubic equation.

d)

Given equation is x²+1 = 0

It is a quadratic equation.

Reason :-

The degree of the given equation is 2.

Answer :-

3x³+2x²+1 = 0 is not a quadratic equation.

Used formulae:-

Quadratic equation

• An equation of the degree 2 is called a quadratic equation.
• The genral form of the quadrtic equation is ax²+bx+c = 0 , a≠0

Cubic equation

• An equation of the degree 3 is called a Cubic equation.
• The genral form of the cubic equation is ax³+bx²+cx+d = 0 , a≠0