Question

Solve usng square roots5x^2-15=20

Answer 1

x = ±
`√(7)`

Explanation:

given

5x² - 15 = 20 ( add 15 to both sides )

5x² = 35 ( divide both sides by 5 )

x² = 7 ( take square root of both sides )

`√(x^2)` = ±
`√(7)` , that is

x = ±
`√(7)`