Advertisements
Advertisements
प्रश्न
Expand (2a + 5)3
बेरीज
Advertisements
उत्तर
(2a + 5)3
Comparing (2a + 5)3 with (a + b)3 we have a = 2a, b = 5
(a + b)3 = a3 + 3a2b + 3ab2 + b3
= (2a)3 + 3(2a)25 + 3(2a)52 + 53
= 23a3 + 3(22a2)5 + 6a(25) + 125
= 8a3 + 60a2 + 150a + 125
shaalaa.com
या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 3: Algebra - Exercise 3.3 [पृष्ठ ९१]
APPEARS IN
संबंधित प्रश्न
Expand.
`(2m + 1/5)^3`
If `a^2 + 1/a^2` = 18; a ≠ 0 find :
(i) `a - 1/a`
(ii) `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)`
If a + 2b = 5; then show that : a3 + 8b3 + 30ab = 125.
If a ≠ 0 and `a - 1/a` = 4; find: `(a^2 + 1/a^2)`
Find the cube of: 4x + 7y
Find the cube of: `4"p" - (1)/"p"`
If x3 + y3 = 9 and x + y = 3, find xy.
Expand: (3x + 4y)3.
Expand: `[x + 1/y]^3`
