Question

Factorise 8x^2 - 1/8

Answer 1

8x^2 - 1/8

= (√8*x)^2 - (1/√8)^2

Applying the identity a^2 - b^2 = (a-b)(a+b),

= (√8x - 1/√8)(√8x + 1/√8)