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2. Quadratic Equations

1.Which of the following is a quadratic equation ?

A) \(\frac{5}{x}-3=x^2 \)

B) \( x (x + 5) = 2 \)

C) \(n – 1 = 2n\)

D) \(\frac{1}{x^2 }(x+2)=x\)

View Answer

Answer :

B) \( x (x + 5) = 2 \)

Explanation :

2.Which of the following is not a quadratic equation?

A) \(x^2+4x=11+x^2\)

B) \(x^2=4x\)

C) \(5x^{2}=90\)

D) \(2x-x2=x2+5\)

View Answer

Answer :

A) \(x^2+4x=11+x^2\)

Explanation :

3. Which of the following is the value of 'k' if root of equation \({x}^{2}+{k}{x}+\mathbf{k}=\mathbf{0} \)
are real and equal?

A) 0

B) 4

C) 0 or 4

D) 2

View Answer

Answer :

C) 0 or 4

Explanation :

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