Question

(2x-1/3x)^2 solve by identity ​

Answer 1

Answer:

given:-

(2x-1)3

this is forming an identity

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

so

(2x-1)3=(2x)3-(1)3-3×(2x)×(1)(2x-1)

(2x-1)3=8x3-1-6x(2x-1)

(2x-1)3=8x3-1-12x2+6x