Question

Which of the following is not a quadratic equation? x^2-55x+750=0 x^2+2x+2=0 x^2+x+8=x^2-4 x^2- 45x=-324

Answer 1

Step-by-step explanation:

answer :-

x^2+x+8= x^2-4

Answer 2

SOLUTION

TO CHOOSE THE CORRECT OPTION

Which of the following is not a quadratic equation

• x² - 55x + 750 = 0

• x² + 2x + 2 = 0

• x² + x + 8 = x² - 4

• x²- 45x = - 324

CONCEPT TO BE IMPLEMENTED

Quadratic equation :

An equation is said to be a quadratic equation if the highest power of its variable that appears with nonzero coefficient is 2

EVALUATION

We know that a equation is said to be a quadratic equation if the highest power of its variable that appears with nonzero coefficient is 2

CHECKING FOR OPTION : 1

In x² - 55x + 750 = 0 the highest power of its variable that appears with nonzero coefficient is 2

So it is a quadratic equation

CHECKING FOR OPTION : 2

In x² + 2x + 2 = 0 the highest power of its variable that appears with nonzero coefficient is 2

So it is a quadratic equation

CHECKING FOR OPTION : 3

x² + x + 8 = x² - 4

⇒x + 12 = 0

In x² + x + 8 = x² - 4 the highest power of its variable that appears with nonzero coefficient is 1

So it is not quadratic equation

CHECKING FOR OPTION : 4

In x²- 45x = - 324 the highest power of its variable that appears with nonzero coefficient is 2

So it is a quadratic equation

So it is a quadratic equation

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