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Simplifying
-28c2 + 7 = 0
Reorder the terms:
7 + -28c2 = 0
Solving
7 + -28c2 = 0
Solving for variable 'c'.
Move all terms containing c to the left, all other terms to the right.
Add '-7' to each side of the equation.
7 + -7 + -28c2 = 0 + -7
Combine like terms: 7 + -7 = 0
0 + -28c2 = 0 + -7
-28c2 = 0 + -7
Combine like terms: 0 + -7 = -7
-28c2 = -7
Divide each side by '-28'.
c2 = 0.25
Simplifying
c2 = 0.25
Take the square root of each side:
c = {-0.5, 0.5}
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