factorise it a^3-1/a^3-2a+2/a
Answers
Answered by
7
a³ - 1/a³ - 2a + 2/a
= (a - 1/a){a² + (a × 1/a) + 1/a²} - 2(a - 1/a)
= (a - 1/a)(a² + 1/a² + 1) - 2(a - 1/a)
= (a - 1/a)(a² + 1/a² + 1 - 2)
= (a - 1/a)(a² + 1/a² - 1),
Similar questions