Expand using binomial expansion (1+6x)^3
(1+6x)^3 = 1+3(6x) +(3)(2)(36x^2)/2 + (3)(2)(1)(216x^3)/6
= 1+18x+108x^2 + 216x^3
OO
Related Maths A Level answers
All answers ▸Find the perpendicular bisector passing through the stationary point of the curve y=x^2+2x-7.
How to find the reciprocal of a graph, such as y=cos(x)?
Differentiate this equation: xy^2 = sin(3x) + y/x
A curve C with an equation y = sin(x)/e^(2x) , 0<x<pi has a stationary point at P. Find the coordinates ofP?