Review of the Grade 7 course
Answers are for parents and teachers.
1
Expand (x - 4)².
x² - 8x + 16
2
Factor 3x² - 12.
3(x - 2)(x + 2)
3
Solve 2(x + 1) - 3(x - 2) = 4.
x = 4
4
40 % of a number is 36. Find the number.
90
5
Why can’t both sides of an equation be multiplied by zero?
Because any equation turns into 0 = 0 and all information about the unknown is lost.