Chapter 14, Lesson 4


14-4.A understand the definition of subtraction
Which is equivalent to the expression —9x —(—4x)?
(a) —13x (b) —5x (c) 5x (d) 13x

14-4.B recognize opposites
Which are not opposites?
(a) (b) 0, 0 (c) 7x, —7x (d) 3x5, —5x3

14-4.C add polynomials
Add.
a.
x2 + 4x b. (4y2 + 7y — 3) + (y2 — 7y — 8)
3x2 — 2x — 9