Use the general formula and you won't have trouble.
Enter in your values and you have it built. Try the first one: a=1, b=7, c=12
I know these are simple but these 2 are eating me up. I am having a real problem with complete the square when it envolves fractions for some reason. These 2 problems must be solved completing the square and please show me all the steps so that I can see where I have been messing up. Thanx
Step1: Move +12 to right side of the equation.
Step 2: Take half the coefficient of x, square it, and add it to both sides.
Step 3: Left side is now a perfect square trinomial.
Step 4: Combine right side
Step 5: Take square root of both sides.
Step 6: Finish up.
Step 7: Finally