Find the coefficient of u^2 in expansion of (2u - 1)^5 using binomial theorem.

Find the vertex of the function given below y=x^2-6x+1

The equation x2 – 1x – 90 = 0 has solutions {a, b}. what is a + b?

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]