Name______________________________________ Date_______________
Period_________
SOLVE BY COMPLETING THE SQUARE WORKSHEET
Steps:
1)
2)
3)
Write the equation in the form: ax 2  bx  c
If a  1, divide both sides by a.
Complete the square to form a perfect square trinomial. (add

b
2
to BOTH sides!)
2
4)
5)
6)
Factor the left side.
Take the square root of both sides (don’t forget  ).
Solve for the variable.
Find the value of c that makes the expression a perfect square trinomial. Then, write the
resulting expression as a binomial squared.
1. x 2  12 x  c
2. x 2  18 x  c
3. x 2  10 x  c
Solve each equation by completing the square.
4. x 2  4 x  11  0
5. x 2  8  6 x
6. x 2  6 x  9  32
7. 2 x 2  12 x  32  0
8. 10 x  x 2  42
9. x 2  10 x  25  49
Find the value of b in each perfect square trinomial.
10. x 2  bx  144
13.
11. x 2  bx  16
Solve by completing the square:
12. x 2  bx  49
x 2  10 x  14  7
What other method could you have used to solve this quadratic equation?__________________
Explain.