Question

(x+1)(x-1)(xla puterea 2+1)(xla puterea 4+1)=?

Answer 1

(x + 1)(x - 1)(x² + 1)(x⁴ + 1) =

= (x² - 1)(x² + 1)(x⁴ + 1)

= (x⁴ - 1)(x⁴ + 1)

= (x⁸ - 1)

am folosit formula a² - b² = (a - b)(a + b)