The number of real zeroes of a polynomial y = p(x) is the number of times its graph intersects or touches the x-axis.The curve crosses the x-axis at three distinct points:1. One point is on the negative x-axis.2. One point is at the origin (or very close to it, intersecting the axis).3. One point is on the positive x-axis.Since there are 3 intersection points with the x-axis, the polynomial has 3 zeroes.