Question

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Answer 1

v ≈ - 5.29, v ≈ 5.29

Explanation:

Given

3v² - 84 = 0 ( add 84 to both sides )

3v² = 84 ( divide both sides by 3 )

v² = 28 ( take the square root of both sides )

v = ±
`√(28)`

Thus

v = -
`√(28)` ≈ - 5.29

v =
`√(28)` ≈ 5.29