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Simplifying
8c2 + -13 + 5 = 0
Reorder the terms:
-13 + 5 + 8c2 = 0
Combine like terms: -13 + 5 = -8
-8 + 8c2 = 0
Solving
-8 + 8c2 = 0
Solving for variable 'c'.
Move all terms containing c to the left, all other terms to the right.
Add '8' to each side of the equation.
-8 + 8 + 8c2 = 0 + 8
Combine like terms: -8 + 8 = 0
0 + 8c2 = 0 + 8
8c2 = 0 + 8
Combine like terms: 0 + 8 = 8
8c2 = 8
Divide each side by '8'.
c2 = 1
Simplifying
c2 = 1
Take the square root of each side:
c = {-1, 1}
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