troytorelli7 troytorelli7

21-04-2020
Mathematics

contestada

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

Respuesta :

jimrgrant1 jimrgrant1

21-04-2020

Answer:

x = ± 3

Step-by-step 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 = ± [tex]\sqrt{9}[/tex] = ± 3

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

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