Find a degree 4 polynomial having zeroes -7, -3, 2 and 7 and the coefficient of x^4 is 1

Sorry guys but as you have a small brain

The ksp expression for the system pbcl2(s) pb+2(aq) + 2 cl-(aq) is: [pbc12][pb+2][2cl-] [pb+2][cl-]2 [pb+2][2cl-]2 [pbcl2][pb+2][cl-]2 [pb+2][2cl-]2[pbcl2]

Solve the equation x/4 - 5= -8 -27 -12 -7 12