Michael J. answered 06/15/15
Tutor
5
(5)
Effective High School STEM Tutor & CUNY Math Peer Leader
1)
x2 - 10x + 25 = 0
Factoring using FOIL.
(x - 5)(x - 5) = 0
Set the factors equal to zero. Note that the factors repeat. This is because it is a perfect square equation.
x - 5 = 0
x = 5
2)
h2 + 6h = 16
Subtract 16 on both sides of equation to make the right side equal to zero.
h2 + 6h - 16 = 0
Factoring using FOIL.
(h + 8)(h - 2) = 0
Set the factors equal to zero.
h + 8 = 0 and h - 2 = 0
h = -8 and h = 2
Try the last one on your own.