Please enter the following details
Free Daily Targets & Mocks
Study Material & Formulas PDFs
1 on 1 Mentorship
Solution
$$(x - 3y)^{3} = x^3 - (3y)^3 - 3x.3y(x - 3y)$$
($$(a - b)^3 = a^3 - b^3 - 3ab(a - b)$$)
= $$x^3 - 27y^3 - 9xy(x - 3y)$$
= $$x^3 - 27y^3 - 9x^2y - 27xy^2$$
The coefficient of x = 27$$y^2$$
Create a FREE account and get:
- Free SSC Study Material - 18000 Questions
- 230+ SSC previous papers with solutions PDF
- 100+ SSC Online Tests for Free
