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Simplifying
25x2 + -121 = 0
Reorder the terms:
-121 + 25x2 = 0
Solving
-121 + 25x2 = 0
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '121' to each side of the equation.
-121 + 121 + 25x2 = 0 + 121
Combine like terms: -121 + 121 = 0
0 + 25x2 = 0 + 121
25x2 = 0 + 121
Combine like terms: 0 + 121 = 121
25x2 = 121
Divide each side by '25'.
x2 = 4.84
Simplifying
x2 = 4.84
Take the square root of each side:
x = {-2.2, 2.2}
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