MCQ
The rationalisation factor of $2+\sqrt3,$ is:
- ✓$2-\sqrt3$
- B$\sqrt2+3$
- C$\sqrt2-3$
- D$\sqrt3-2$
✓
Answer
Correct option: A.
$2-\sqrt3$
Rationalisation factor of any number like ${\text{a}}\pm\sqrt{\text{b}}$ is ${\text{a}}\mp\sqrt{\text{b}}.$
So. Rationalisation factor of $2+\sqrt3$ will be $2-\sqrt3$
Hence, correct option is $(a).$
So. Rationalisation factor of $2+\sqrt3$ will be $2-\sqrt3$
Hence, correct option is $(a).$
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
Which of the following is an rational number$?$
→If $(x + 2)$ and $(x - 1)$ are factors of the polynomial $p(x) = x3 + 10x2 + mx + n$ then:
→If $x + y + z = 0$ then $x^3+y^3+z^3$ is:
→The mean of the below frequency distribution is $3.5$, then the value of $x$ is:
→|
Varible
|
$1$
|
$2$
|
$x$
|
$4$
|
$5$
|
|
Frequency
|
$2$
|
$3$
|
$4$
|
$5$
|
$6$
|
Which of the following is a false statement?
In the given figure, $ABCD$ is a rhombus. Then:
→In Fig , the value of $y$ is
→Write the correct answer in the following: One of the zeroes of the polynomial $2x^2 + 7x - 4 $ is.
→If each side of a $\triangle$ is halved then its perimeter will be decreased by:
→Two circle are congruent if they have equal.