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.
(k + 4)3
Expand.
(7 + m)3
Use property to evaluate : 93 - 53 - 43
If 4x2 + y2 = a and xy = b, find the value of 2x + y.
If a ≠ 0 and `a - 1/a` = 4; find: `(a^2 + 1/a^2)`
Find the cube of: 4x + 7y
If a + b = 5 and ab = 2, find a3 + b3.
If m - n = -2 and m3 - n3 = -26, find mn.
Evaluate the following :
(5.45)3 + (3.55)3
a3 + b3 = (a + b)3 = __________
