MCQ
If $x-3$ is a factor of $x^2-a x-15$, then $a=$
- ✓-2
- B5
- C-5
- D3
✓
Answer
Correct option: A.
-2
a
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
A die is thrown 1000 times and the outcomes were recorded as follows:
find probability of?
| Outcome | 1 | 2 | 3 | 4 | 5 | 6 |
| Frequency | 180 | 150 | 160 | 170 | 150 | 190 |
The zeros of the polynomial p(x) = x2 - 3x are:
Rationalisation of the denominator of $\frac{1}{\sqrt{5}+\sqrt{2}}$ gives:
→- $\frac{1}{\sqrt{10}}$
- $\sqrt{5}+\sqrt{2}$
- $\sqrt{5}-\sqrt{2}$
- $\frac{\sqrt{5}-\sqrt{2}}{3}$
The number of consecutive zeros in $2^3 \times 3^4 \times 5^4 \times 7$, is
→Write the correct answer in the following:
In Fig. if $\text{AB}||\text{CD}||\text{EF},\text{PQ}||\text{RS},$ $\angle\text{RQD}=25^\circ$ and $\angle\text{CQP}=60^\circ,$ then $\angle\text{QRS}$ is equal to.
→In Fig. if $\text{AB}||\text{CD}||\text{EF},\text{PQ}||\text{RS},$ $\angle\text{RQD}=25^\circ$ and $\angle\text{CQP}=60^\circ,$ then $\angle\text{QRS}$ is equal to.
- 85°
- 135°
- 145°
- 110°
A surface of shape has:
Write the correct answer in the following:
$\frac{1}{\sqrt{9}-\sqrt{8}}$ is equal to
→$\frac{1}{\sqrt{9}-\sqrt{8}}$ is equal to
- $\frac{1}{2}(3-2\sqrt{2})$
- $\frac{1}{3+2\sqrt{2}}$
- $3-2\sqrt{2}$
- $3+2\sqrt{2}$
Diagonals of a quadrilateral ABCD bisect each other. If $\angle\text{A}=45^\circ,$ then $\angle\text{B}=$
→- 115°
- 120°
- 125°
- 135°
He surface areas of two spheres are in the ratio 16 : 9. The ratio of their volumes is: