Expand the following by using binomial theorem: (i) (2a – 3b)^4 (ii) (x + 1/y)^7

Question

Expand the following by using binomial theorem: 

(i) (2a – 3b)⁴ 

(ii) (x + \(\frac{1}{y}\))⁷

(iii) (x + \(\frac{1}{x^2}\))⁶

Answer 1

 (i) (2a – 3b)⁴ 

(ii) (x + \(\frac{1}{y}\))⁷

(iii) (x + \(\frac{1}{x^2}\))⁶

+ ⁶C₆\((\frac{1}{x^2})^6\)