College Algebra Exam 1 Solutions

4.

first factor out gcf

now use ac method to factor trinomial
a=-3,b=-7,c=6 ac=-18 so # pair is - 9 and 2

group terms and factor gc

5.

factor out gcf

Domain is all real numbers except 3 and 6

Since Absolute value cannot be<0
answer is empty set Ø

10. If the area of a triangle is (x^2-x-6), and the base is
(x-3), what polynomial represents the height of the
triangle? The area of a triangle is ½ bh.

b=x-3 so substitue in and you get