Question

Solve the quadratic equation for x. What is one of the roots? 5x2 − 45 = 0

Answer 1

x = ± 3

Explanation:

Given

5x² - 45 = 0 ( divide through by 5 )

x² - 9 = 0 ( add 9 to both sides )

x² = 9 ( take the square root of both sides )

x = ±
`√(9)` = ± 3

Thus the roots are x = - 3, x = 3