Question

solve for the solition set of the following expressions using completing square


1. x2+9x+18=0

2. 2x2+12x+4=0

3. x2+6x-8

Answer 1

help please

Answer 2

1. 9/2 = 4.5 &4.5^2 = 20.25
so you need to add something onboth sides to 18 to get to 20.25
and then get a (x+4.5)^2= y

2. start by dividing the whole thing by 2