Question

Solve. 5q^2 + 20 = 425

Answer 1

c...................................................................................

Answer 2

A

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 = ±
`√(81)` = ± 9

Solution is { - 9, 9 }