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Simplifying
[x2 + -17] = 8
Reorder the terms:
[-17 + x2] = 8
Remove brackets around [-17 + x2]
-17 + x2 = 8
Solving
-17 + x2 = 8
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '17' to each side of the equation.
-17 + 17 + x2 = 8 + 17
Combine like terms: -17 + 17 = 0
0 + x2 = 8 + 17
x2 = 8 + 17
Combine like terms: 8 + 17 = 25
x2 = 25
Simplifying
x2 = 25
Take the square root of each side:
x = {-5, 5}
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