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exis [7]
3 years ago
8

Solve the equation below for the exact values of 4x2-5=75 ​

Mathematics
1 answer:
Gala2k [10]3 years ago
3 0

Answer:

x = ± 2\sqrt{5}

Step-by-step explanation:

Given

4x² - 5 = 75 ( add 5 to both sides )

4x² = 80 ( divide both sides by 4 )

x² = 20 ( take the square root of both sides )

x = ± \sqrt{20}

  = ± \sqrt{4(5)}

  = ± 2\sqrt{5}

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