Chapter VI review. Review of the Grade 7 algebra course
Answers are for parents and teachers.
1
Simplify (a + 2)² - (a - 2)².
8a
2
Factor x³ - 9x completely.
x(x - 3)(x + 3)
3
Solve 3x - 5 = x + 9.
7
4
In how many orders can 6 people sit in a row?
720
5
Reduce (x² - 9)/(x² + 3x) and find its value at x = 6.
(x - 3)/x = 1/2