Advertisements
Advertisements
Question
Expand: (3a – 4b)3
Sum
Solution
(a – b)3 = a3 – b3 – 3ab(a – b)
(3a – 4b)3 = (3a)3 – (4b)3 – 3(3a)(4b)(3a – 4b)
= 27a3 – 64b3 – 36ab(3a – 4b)
= 27a3 – 64b3 – 108a2b + 144ab2
shaalaa.com
Is there an error in this question or solution?
