MCQ
Write the correct answer in the following: The factorisation of $4 x^2+8 x+3$ is.
- A$(x + 1)(x + 3)$
- ✓$(2x + 1)(2x + 3)$
- C$(2x + 2)(2x + 5)$
- D(2x –1)(2x –3)
✓
Answer
Correct option: B.
$(2x + 1)(2x + 3)$
Now, $4 x^2+8 x+3=4 x^2+6 x+2 x+3 [$by splitting middle term$]$
$= 2x(2x + 3) + 1 (2x + 3)$
$= (2x + 3)(2x + 1)$
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
$23 . \overline{43}$ when expressed in the form $\frac{p}{q}(p, q$ are integers $q \neq 0)$, is
→The value of $\Big(\frac{\text{x}^{\text{l}}}{\text{x}^{\text{m}}}\Big)^{\frac{1}{\text{lm}}}\times\Big(\frac{\text{x}^{\text{m}}}{\text{x}^{\text{n}}}\Big)^{\frac{1}{\text{mn}}}\times\Big(\frac{\text{x}^{\text{n}}}{\text{x}^{\text{l}}}\Big)^{\frac{1}{\text{nl}}}$ is:
→The height of a cone is $21 \ cm$ and its slant height is $28 \ cm .$ The volume of the cone is:
→The decimal expansion of $\sqrt{2}$ is:
→In a $\triangle\text{ABC,}$ it is given that base $= 12\ cm$ and height $= 5\ cm$. Its area is:
→Two equal circles of radius $r$ intersect such that each passes through the centre of the other. The length of the common chord of the circle is:
→Which of the following is equal to $'x'?$
→The side $BC$ of $\triangle\text{ABC}$ is produced to a poin D. The bisector of $\angle\text{A}$ meet side $BC$ in $L.$ If $\angle\text{ABC}=30^\circ$ and $\angle\text{ACD}=115^\circ,$ then $\angle\text{ALC}=$
→In the following distribution:
The number of workers having wage range $($in $Rs.) 110-120$ is:
→|
Wages(in Rs)
|
No of workers
|
|
More than $140$
|
$12$
|
|
More than $130$
|
$27$
|
|
More than $120$
|
$60$
|
|
More than $110$
|
$105$
|
|
More than $100$
|
$124$
|
|
More than $90$
|
$141$
|
|
More than $80$
|
$150$
|
In the figure, if $AB = BC$ and $BX = BY,$ then:
→