Y=x^2+6x Apply the value of y into the equation below: 4x-y=-24 4x-(x^2+6x) = -24 4x-x^2-6x = -24 x^2+2x-24=0 (x+6)(x-4)=0 Therefore x can be -6 or 4 If x = -6 Then y = (-6)^2+6(-6) = 36 -36=0 If x = 4 Then y = (4)^2 + 6(4) = 16 + 24 = 40<span> </span>