Advertisements
Advertisements
प्रश्न
Find the cube of: 2a - 5b
योग
Advertisements
उत्तर
Using (a - b)3
= a3 - b3 - 3ab (a - b)
(2a - 5b)
= (2a)3 - (5b)3 - 3(2a) (5b) (2a - 5b)
= 8a3 - 125b3 - 30ab (2a - 5b)
= 8a3 - 125b3 - 60a2b + 150ab2.
shaalaa.com
क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
APPEARS IN
संबंधित प्रश्न
Expand.
(7x + 8y)3
Simplify.
(3r − 2k)3 + (3r + 2k)3
Find the cube of : 3a- 2b
If a2 + `1/a^2 = 47` and a ≠ 0 find :
- `a + 1/a`
- `a^3 + 1/a^3`
Use property to evaluate : 133 + (-8)3 + (-5)3
If 2x - 3y = 10 and xy = 16; find the value of 8x3 - 27y3.
If a ≠ 0 and `a - 1/a` = 4 ; find : `( a^3 - 1/a^3 )`
If `"r" - (1)/"r" = 4`; find : `"r"^3 - (1)/"r"^3`
If `"a" + 1/"a"` = 6, then find the value of `"a"^3 + 1/"a"^3`
Expand (3p + 4q)3
