Advertisements
Advertisements
Question
Expand (5 − x)3
Sum
Solution
(5 − x)3
Comparing (5 – x)3 with (a – b)3 we have a = 5 and b = x
(a – b)3 = a3 – 3a2b + 3ab2 – b3
(5 – x)3 = 53 – 3(5)2(x) + 3(5)(x2) – x3
= 125 – 3(25)(x) + 15x2 – x3
= 125 – 75x + 15x2 – x3
shaalaa.com
Is there an error in this question or solution?
APPEARS IN
RELATED QUESTIONS
Expand.
(4 − p)3
Expand.
`(x/3 - 3/x)^3`
Find the cube of 99 using the expansion formula.
Simplify.
(p + q)3 + (p - q)3
Simplify.
(2x + 3y)3 - (2x - 3y)3
Expand: (3a – 4b)3
If `(y - 1/y)^3` = 27, then find the value of `y^3 - 1/y^3`
Expand (ab – c)3
Expand (97xy)3
(a – b) = 3 and ab = 5 then a3 – b3 = __________
