Advertisements
Advertisements
Question
Expand.
(7 + m)3
Sum
Advertisements
Solution
(7 + m)3
= (7)3 + 3 × (7)2 × (m) + 3 × (7) × (m)2 + (m)3 …[∵ (a + b)3 = a3 + 3a2b + 3ab2 + b3]
= 343 + 3(49)(m) + 3(7)(m2) + m3
= 343 + 147m + 21m2 + m3
shaalaa.com
Is there an error in this question or solution?
RELATED QUESTIONS
If a + 2b = 5; then show that : a3 + 8b3 + 30ab = 125.
If a + 2b + c = 0; then show that: a3 + 8b3 + c3 = 6abc.
Use property to evaluate : 73 + 33 + (-10)3
Expand : (3x + 5y + 2z) (3x - 5y + 2z)
Expand : (3x - 5y - 2z) (3x - 5y + 2z)
Find the cube of: 4x + 7y
Simplify:
`("a" + 1/"a")^3 - ("a" - 1/"a")^3`
Evaluate the following :
(3.29)3 + (6.71)3
Evaluate the following :
(5.45)3 + (3.55)3
Expand (2a + 5)3
