SOLUTION: Add the proper constant to the binomial so that the resulting trinomial is a perfect square. Then factor the trinomial. problem: r^2+22r

Algebra ->  Quadratic Equations and Parabolas  -> Quadratic Equations Lessons -> SOLUTION: Add the proper constant to the binomial so that the resulting trinomial is a perfect square. Then factor the trinomial. problem: r^2+22r      Log On


   

Question 1156398: Add the proper constant to the binomial so that the resulting trinomial is a perfect square. Then factor the trinomial.
problem: r^2+22r
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
Add the proper constant to the binomial so that the resulting trinomial is a perfect square.
Then factor the trinomial.
problem: r^2+22r
:
To find this, divide the coefficient of r by 2, then square it; 11^2 = 121
r^2 + 22r + 121
Factors to
(r+11)(r+11)