Question

What's the value of x

`{x}^(2) - {15}^(2) = {8}^(2)`
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Answer 1

The value of X would be plus and minus 17 for the fact you got the square root of 289.

Answer 2

`{x}^(2) - {15}^(2) = {8}^(2) \\ \\ {x}^(2) - 225 = 64 \\ \\ {x}^(2) = 64 + 225 \\ \\ {x}^(2) = 289 \\ \\ x = 17`