what is the value of c that completes the square? z2(squared)+11/8z+c
z^2 + (11/8)z + c
Take 1/2 of 11/8 = 11/16......now......square it = 121 / 256...... this is "c"
So we have
z^2 + (11/7)z + 121 / 256 =
(z + 11/16) ^2