Hello : the discriminat of each quadratic equation : ax²+bx+c=0 ....(a <span>≠ 0) is : </span><span>Δ = b² -4ac 1 ) </span>Δ > 0 the equation has two reals solutions : x = (-b±√Δ)/2a 2 ) Δ = 0 : one solution : x = -b/2a 3 ) Δ <span>< 0 : no reals solutions</span>