What number must be added to the expression below to complete the square?

x2 - 18x

a. -81
b. -9
c. 81
d. 9

Solve this and show you’re work step by step ! -5 3/4+3h< 9 1/4 -

What is the point of inflection for the function f(x)=2cos4x on the interval (0, pi/2)

To diagonalize an nxn matrix a means to find an invertible matrix p and a diagonal matrix d such that a pdp d p ap or [1 3 dh epap 3 let a=-3 -5 -3 3 3 1 step 1: find the eigenvalues of matrix a "2's" step 2: find the corresponding eigenvectors of a step 3: createp from eigenvectors in step 2 step 4 create d with matching eigenvalues.