Advertisements
Advertisements
प्रश्न
Find the cube of : 3a- 2b
बेरीज
उत्तर
( a - b )3 = a3 - 3ab( a - b ) - b3
( 3a - 2b )3 = (3a)3 - 3 x 3a x 2b( 3a - 2b) - (2b)3
= 27a3 - 18ab( 3a - 2b ) - 8b3
= 27a3 - 54a2b + 36ab2 - 8b3
shaalaa.com
या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
APPEARS IN
संबंधित प्रश्न
Simplify.
(3r − 2k)3 + (3r + 2k)3
If a2 + `1/a^2 = 47` and a ≠ 0 find :
- `a + 1/a`
- `a^3 + 1/a^3`
If `a + 1/a` = p and a ≠ 0; then show that:
`a^3 + 1/a^3 = p(p^2 - 3)`
Expand : (3x + 5y + 2z) (3x - 5y + 2z)
Expand : (3x - 5y - 2z) (3x - 5y + 2z)
If X ≠ 0 and X + `1/"X"` = 2 ; then show that :
`x^2 + 1/x^2 = x^3 + 1/x^3 = x^4 + 1/x^4`
If a + b = 5 and ab = 2, find a3 + b3.
Expand: (3x + 4y)3.
Expand (3 + m)3
Expand (3p + 4q)3
