solve x^3-x=0
Let's solve in ℝ: x3 -x = 0
You can write the expression: x3 -x in factored form: x·(x2 -1)
A product is zero if and only if one of its factors is zero: we solve each factor equal to 0
⇥Let's solve in ℝ: x = 0
⇥Solution found: x = 0
⇥Let's solve in ℝ: x2 -1 = 0
⇥The two numbers whose square is 1 are -1 and 1
⇥Solutions obtained: x = { -1, 1 }
▶Solution:   x = { -1, 0, 1 }