1. ## which of the following are quadratic equation in x? √2x²+7x+5√2

Given, 2​x²+7x+5√2​=0 Highest Degree 2 And it is of the form ax²+bx+c=0 Therefore it is a quadratic equation.

Given, 2+7x+5√2=0
Highest Degree 2

And it is of the form a+bx+c=0
Therefore it is a quadratic equation.

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2. ## which of the following are quadratic equation in x? x²-3x-√x+4=0

Hope it helps you.

Hope it helps you.

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3. ## which of the following are quadratic equation in x? x-6/x=3

Given, x−6/x=3 Simply as x²−3x−6=0 Degree 2 And it is of the form ax²+bx+c=0 Therefore it is a quadratic equation.

Given, x6/x=3
Simply as 3x6=0
Degree 2

And it is of the form a+bx+c=0
Therefore it is a quadratic equation.

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4. ## which of the following are quadratic equation in x? x+2/x=x²

Given, x+2/x=x² Simplify above equation x³−x²=0 Degree 3 And it is not of the form ax²+bx+c=0 Therefore it is not a quadratic equation.

Given, x+2/x=
Simplify above equation
=0
Degree 3
And it is not of the form a+bx+c=0
Therefore it is not a quadratic equation.

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5. ## which of the following are quadratic equation in x? 2x²+5x/2-√3

Clearly 2x² + 5/2 x - √3 = 0 is a quadratic polynomial 2x² + 5/2 x - √3 = 0  is a quadratic equation.

Clearly 2x² + 5/2 x – √3 = 0 is a quadratic polynomial

2x² + 5/2 x – √3 = 0  is a quadratic equation.

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6. ## Which of the following are quadratic equation in x? x²-x+3=0

x² - x +3 =0 is a quadratic polynomial x² - x +3 =0 is a quadratic equation.

x² – x +3 =0 is a quadratic polynomial

x² – x +3 =0 is a quadratic equation.

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7. ## which of the following are quadratic equation in x? x²-1/x²=5

x²+1/x²​=5 (x4+1)/x²​=5 x4+1=5x² x4−5x²+1=0 It is not of the form ax²+bx+c=0 Therefore,the given equation is not a quadratic equation.

## x4−5x²+1=0

It is not of the form a+bx+c=0
Therefore,the given equation is not a quadratic equation.

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8. ## which of the following are quadratic equation in x? (x+2)³=x³-8

(x+2)³=x³−8 x³+8+6x²+12x=x³−8 −6x²+12x+16=0 Degree =2 It is a quadratic equation

## (x+2)³=x³−8

+8+6+12x=8

6+12x+16=0

Degree =2

It is a quadratic equation

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9. ## which of the following are quadratic equation in x? (2x+3)(3x+2)=6(x-1)(x-2)

(2x+3)(3x+2)=6(x−1)(x−2) Simplify above equation 6x²+4x+9x+6=6x²−12x−6x+12 31x−6=0 Degree 1 Not a quadratic equation

## (2x+3)(3x+2)=6(x−1)(x−2)

Simplify above equation

6+4x+9x+6=612x6x+12

31x6=0

Degree 1

Not a quadratic equation

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10. ## Which of the following is a quadratic equation in x? (x+1/x)²=2(x+1/x)+3

(x4+2+1/x4=(2x²+2)/x+3 (x4+2x²+1)x=x²(2x²+2)+3

## (x4+2+1/x4=(2x²+2)/x+3

(x4+2+1)x=(2+2)+3

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