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Which of the following equations is a qu...

Which of the following equations is a quadratic?

A

`x^(3)-x^(2)-x +5=0`

B

`x^(4)-10`

C

`7x^(2)=49`

D

`x^(4)-x^(3)=9000`

Text Solution

Verified by Experts

The correct Answer is:
C
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Knowledge Check

  • Which of the following expression is a quadratic polynomial?

    A
    `2x+3`
    B
    `3x^(2)-5x+4`
    C
    `(1)/(2x^(2)+3x+5)`
    D
    None of these.

  • 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`

  • Which of the following is a quadratic equation?

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

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