3 years ago

Solve x^2 + y^2 = 81 for x. Show solution steps.

Mathematics

1 answer:

Charra [1.4K]3 years ago

7 0

Answer:

x = ±√(81 -y^2)

Step-by-step explanation:

Subtract y^2 and take the square root.

x^2 +y^2 -y^2 = 81 -y^2 . . . . . subtract y^2

x^2 = 81 -y^2 . . . . . simplify

x = ±√(81 -y^2) . . . . take the square root

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