1.The sum of all the roots of the equation x28−8x15+15x2+7=0x^{28} - 8x^{15} + 15x^2 + 7 = 0x28−8x15+15x2+7=0 is:a.9−39 - \sqrt{3}9−3b.9+39 + \sqrt{3}9+3c.11−311 - \sqrt{3}11−3d.11+311 + \sqrt{3}11+3Login to continueOnly logged in users canattempt or see the solution.
