2 years ago

Help please I need an answer for this fast

Mathematics

1 answer:

castortr0y [4]2 years ago

6 0

Answer:

B 9, -9

Step-by-step explanation:

x^2 - 81 = 0

Add 81 to each side

x^2 = 81

Take the square root of each side

sqrt(x^2) = sqrt(81)

x = ±9

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Work Shown:

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