MCQ
A quadratic equation whose one root is 2 and the sum of whose roots is zero, is
- A$x^2+4=0$
- ✓$x^2-4=0$
- C$4 x^2-1=0$
- D$x^2-2=0$
✓
Answer
Correct option: B.
$x^2-4=0$
B
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Choose the correct option and give justification. If tangents PA and PB from a point P to a circle with centre O are inclined to each other at angle of 80°, then $\angle$POA is equal to:
→If (-1, 2), (2, -1) and (3, 1) are any three vertices of a parallelogram, then:
In Fig. $A P$ is a tangent to the circle with centre $O$ such that $O P=4 cm$ and $\angle O P A=30^{\circ}$. Then, $A P=$
→Find the value of $k$ for which the system of equations, $x+y-4=0$ and $2 x+k y-3=0$ has no solution.
→$\triangle\text{ABC}\sim\triangle\text{PQR}$ such that $\text{ar}(\triangle\text{ABC})=4\ \text{ar}(\triangle\text{PQR}).$ If BC = 12cm, then QR =
→The distance between the points $(\text{a}\cos\theta+\text{b}\sin\theta,0)$ and $(0,\text{a}\sin\theta-\text{b}\cos\theta),$ is :
→The mean of all the factors of $24$ is :
→If $2 x-3 y=7$ and $(a+b) x-(a+b-3) y=4 a+b$ represent coincident lines, then $a$ and $b$ satisfy the equation
→If the mode of the data is $45$ and the median is $33,$ then the mean is :
→If $a=2^3 \times 3, b=2 \times 3 \times 5, c=3^n \times 5$ and $\operatorname{LCM}(a, b, c)=2^3 \times 3^2 \times 5$, then $n=$
→