230 Answer Key
- x^2 − 10x = −25
x^2 − 10x + 25 = −25 + 25
(x − 5)^2 = 0
x = 5 - −x^2 = −9
x^2 = 9
x = ±3
10. 6x^2 = x + 2
6 x^2 − x − 2 = 0
(2x + 1)(3x − 2) = 0
2 x + 1 = 0 or 3x − 2 = 0
x=−
1
2
or x=
2
3
Chapter 16 The Cartesian Coordinate Plane
Exercise 16
True
False
True
False
True
False
rise
run
negative
positive
zero
2
3
- −
4
3
- undefi ned