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Simplifying
25 = 9 + c2
Solving
25 = 9 + c2
Solving for variable 'c'.
Move all terms containing c to the left, all other terms to the right.
Add '-1c2' to each side of the equation.
25 + -1c2 = 9 + c2 + -1c2
Combine like terms: c2 + -1c2 = 0
25 + -1c2 = 9 + 0
25 + -1c2 = 9
Add '-25' to each side of the equation.
25 + -25 + -1c2 = 9 + -25
Combine like terms: 25 + -25 = 0
0 + -1c2 = 9 + -25
-1c2 = 9 + -25
Combine like terms: 9 + -25 = -16
-1c2 = -16
Divide each side by '-1'.
c2 = 16
Simplifying
c2 = 16
Take the square root of each side:
c = {-4, 4}
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