daveolivercampbell daveolivercampbell

31-12-2021
Mathematics

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Solve the quadratic by taking square roots Round to the nearest tenth. 2x² - 9 = 121

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sqdancefan sqdancefan

31-12-2021

Answer:

x ≈ ±8.1

Step-by-step explanation:

2x² -9 = 121 . . . . given

2x² = 130 . . . . . . add 9

x² = 65 . . . . . . . .divide by 2

x = ±√65 . . . . . take the square root

x ≈ ±8.1

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