c^2=3c-40

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Solution for c^2=3c-40 equation:


Simplifying
c2 = 3c + -40

Reorder the terms:
c2 = -40 + 3c

Solving
c2 = -40 + 3c

Solving for variable 'c'.

Reorder the terms:
40 + -3c + c2 = -40 + 3c + 40 + -3c

Reorder the terms:
40 + -3c + c2 = -40 + 40 + 3c + -3c

Combine like terms: -40 + 40 = 0
40 + -3c + c2 = 0 + 3c + -3c
40 + -3c + c2 = 3c + -3c

Combine like terms: 3c + -3c = 0
40 + -3c + c2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-40' to each side of the equation.
40 + -3c + -40 + c2 = 0 + -40

Reorder the terms:
40 + -40 + -3c + c2 = 0 + -40

Combine like terms: 40 + -40 = 0
0 + -3c + c2 = 0 + -40
-3c + c2 = 0 + -40

Combine like terms: 0 + -40 = -40
-3c + c2 = -40

The c term is -3c.  Take half its coefficient (-1.5).
Square it (2.25) and add it to both sides.

Add '2.25' to each side of the equation.
-3c + 2.25 + c2 = -40 + 2.25

Reorder the terms:
2.25 + -3c + c2 = -40 + 2.25

Combine like terms: -40 + 2.25 = -37.75
2.25 + -3c + c2 = -37.75

Factor a perfect square on the left side:
(c + -1.5)(c + -1.5) = -37.75

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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