Write in the form y=a(x-p)^2+q

please show the steps..
a)y=-2x^2+6x+11
b)y=-x^2-3x-3
c)y=1.5x^2-9x+10

factor out any coefficent of x

y= -2(x^-3x) + 11

Now, complete the square in the ( )
y=-2(x^2-3x+9/4) + 11 - 9/4
y=-2(x-3/2)^2- 8 3/4