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Simplifying
81 = x2 + 49
Reorder the terms:
81 = 49 + x2
Solving
81 = 49 + x2
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-1x2' to each side of the equation.
81 + -1x2 = 49 + x2 + -1x2
Combine like terms: x2 + -1x2 = 0
81 + -1x2 = 49 + 0
81 + -1x2 = 49
Add '-81' to each side of the equation.
81 + -81 + -1x2 = 49 + -81
Combine like terms: 81 + -81 = 0
0 + -1x2 = 49 + -81
-1x2 = 49 + -81
Combine like terms: 49 + -81 = -32
-1x2 = -32
Divide each side by '-1'.
x2 = 32
Simplifying
x2 = 32
Take the square root of each side:
x = {-5.656854249, 5.656854249}
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