Evaluate for: a = 4, b = 8, c = -2
15).
a (b + c) + b(a + c)
16).
Evaluate for: a = .5, b = 2, c = 4 (use a calculator!)
17).
a b - 2 a c + a c
= ______
18).
= ______
Evaluate for: a = 4, b = 9, c = -5
19).
= ______
20).
= ______