Mathematical inequality problem: if the equation is equal to zero, is it equivalent? Please give an example.
I don't know if you asked = 0 or ≥0. Equation = 0, let numerator = 0 and denominator ≠0. If ≥0, it means that both numerator and denominator are multiplied by ≥0 and denominator ≠0. (X+ 1)/(X+2)≥0, which is equivalent to (X+ 1) multiplied by (X+2)≥0, X≦-2, x.