Advertisements
Advertisements
प्रश्न
Find the cube of : 3a- 2b
योग
Advertisements
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
क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
APPEARS IN
संबंधित प्रश्न
Expand.
`((5x)/y + y/(5x))^3`
Find the cube of: `( 3a - 1/a ) (a ≠ 0 )`
Use property to evaluate : 93 - 53 - 43
Two positive numbers x and y are such that x > y. If the difference of these numbers is 5 and their product is 24, find:
- Sum of these numbers
- Difference of their cubes
- Sum of their cubes.
Expand : (3x + 5y + 2z) (3x - 5y + 2z)
Find the cube of: `"a" - (1)/"a" + "b"`
If m - n = -2 and m3 - n3 = -26, find mn.
If x + 2y = 5, then show that x3 + 8y3 + 30xy = 125.
Expand: (41)3
Find 27a3 + 64b3, if 3a + 4b = 10 and ab = 2
