Maharashtra BoardEnglish MediumSTD 10MathsP-1 Quadratic Equations1 Mark
MCQ
Which one is the quadratic equation?
A
$\frac{5}{x}-3=x^2$
B
$x(x+5)=2$
C
$n-1=2 n$
D
$\frac{1}{x^2}(x+2)=x$
✓
Answer
In option $A \frac{5}{x}-3=x^2 \Rightarrow 5-3 x=x^3$. hence, it is not a quadratic equation. In Option $B x(x+5)=2 \Rightarrow x^2+5 x-2=0$, it is a quadratic equation. In Option $C n -1=2 n \Rightarrow 2 n - n =-1 \Rightarrow n =-1$, it is not a quadratic equation. In Option $D \frac{1}{x^2}(x+2)=x \Rightarrow x+2=x^3$, hence, it is not a quadratic equation.
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