Question

What is the solution set of the equation:
7q^2 - 28 = 0

Answer 1

7q² - 28 = 0
+ 28 + 28
7q² = 28
7 7
q² = 4
q = ±4
q = 4 or q = -4

Solution Set: {±4} and q = 4 or q = -4