Answer:
c...................................................................................
A
Step-by-step explanation:
Isolate 5q² by subtracting 20 from both sides
5q² = 405 ( divide both sides by 5 )
q² = 81 ( take the square root of both sides )
q = ± [tex]\sqrt{81}[/tex] = ± 9
Solution is { - 9, 9 }
