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Which of the following is a quadratic eq...

Which of the following is a quadratic equation?

A

`x^(1/2)+2x+3=0`

B

`(x-1)(x+4)=x^(2)+1`

C

`x^(4)-3x+5=0`

D

`(2x+1)(3x-4)=2x^(2)+3`

Text Solution

Verified by Experts

The correct Answer is:
D
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Knowledge Check

  • Which of the following is quadratic equation ?

    A
    `x^(3)-2x^(2)-sqrt(5)-x=0`
    B
    `3x^(2)-5x+9=x^(2)-7x+3`
    C
    `((x+1)/x)^(2)=3((x+1)/(x+4))`
    D
    `x^(3)+x+36`

  • Which of the following is a quadratic eqaution ?

    A
    `6x^(2) = 2 -x^(3)`
    B
    `x^(2) ((1)/(x) -2) = (7)/(2)`
    C
    `(3)/(x) - 3= 4x^(2)`
    D
    `5x+7= 3 x `

  • (sqrt3+i)^100=2^99(p+iq) then p and q are the roots of which of the following quadratic equation?

    A
    `x^2-(sqrt3+1)x-sqrt3=0`
    B
    `x^2-(sqrt3-1)x-sqrt3=0`
    C
    `x^2+(sqrt3+1)x+sqrt3=0`
    D
    None

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    Which of the following are quadratic equations? x^(2)+6x-4=0( ii) sqrt(3)x^(2)-2x+(1)/(2)=0 (iii) x^(2)+(1)/(x^(2))=5

    Which of the following are quadratic equations? 3x^(2)-5x+9=x^(2)-7x+3 (ii) x+(1)/(x)=1( iii) x^(2)-3x=0

    Which of the following are quadratic equations? x^(2)+2sqrt(x)-3=0 (ii) 3x^(2)-4x+2=2x^(2)-2x+4

    Which of the following are quadratic equations? x-(3)/(x)=x^(2) (ii) 2x^(2)-sqrt(3x)+9=0 (iii) x^(2)-2x-sqrt(x)-5=0

    Which of the following is not a quadratic equation?

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