Advertisement Remove all ads

Write the following cube in expanded form:- (2x + 1)^3 - Mathematics

Advertisement Remove all ads
Advertisement Remove all ads
Advertisement Remove all ads

Write the following cube in expanded form:- (2x + 1)3 

Advertisement Remove all ads

Solution

It is known that,

(a + b)3 = a3 + b3 + 3ab(a + b)  and  (a - b)3 = a3 - b3 - 3ab(a - b)

(2x+1)3 (2x)3+13+(3×2x×1)(2x+1)

             = 8x3+1+6x(2x+1)

             = 8x3+12x3+6x+1

Concept: Algebraic Identities
  Is there an error in this question or solution?

APPEARS IN

NCERT Class 9 Maths
Chapter 2 Polynomials
Exercise 2.5 | Q 6.1 | Page 49

Video TutorialsVIEW ALL [1]

Advertisement Remove all ads
Share
Notifications

View all notifications


      Forgot password?
View in app×