MCQ
The Expanded of (3x - 5)3 is:
- A27x3 + 135x2 - 225x - 125
- B27x3 + 135x2 + 225x - 125
- C27x3 - 135x2 + 225x - 125
- DNone of these.
✓
Answer
- 27x3 - 135x2 + 225x - 125
Solution:
(3x - 5)3
= (3x)3 - (5)3 - 3 × 3x × 5(3x - 5)
= 27x3 - 125 - 135x2 + 225x
= 27x3 - 135x2 + 225x - 125
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
The point of the form (a, -a), where a lies on:
The figure formed by joining the mid-points of the adjacent sides of a parallelogram is a:
In the given figure, straight lines AB and CD interect at O.If $\angle\text{AOC}=\phi,\angle\text{BOC}=\theta$ and $\theta=3\phi,$
then $\phi=?$
→then $\phi=?$
- 30º
- 40º
- 45º
- 60º
A point both of whose coordinates are negative will lie in:
The sides of a triangle are 11 cm, 15 cm and 16 cm. The altitude to the largest side is
Boundaries of surfaces are:
The distance of the point P (4, 3) from the origin is
The square root of $\frac{x^2}{9}+\frac{9}{4 x^2}-\frac{x}{3}-\frac{3}{2 x}+\frac{5}{4}$ is
→→