3r^2-12r+35=0

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Solution for 3r^2-12r+35=0 equation:


Simplifying
3r2 + -12r + 35 = 0

Reorder the terms:
35 + -12r + 3r2 = 0

Solving
35 + -12r + 3r2 = 0

Solving for variable 'r'.

Begin completing the square.  Divide all terms by
3 the coefficient of the squared term: 

Divide each side by '3'.
11.66666667 + -4r + r2 = 0

Move the constant term to the right:

Add '-11.66666667' to each side of the equation.
11.66666667 + -4r + -11.66666667 + r2 = 0 + -11.66666667

Reorder the terms:
11.66666667 + -11.66666667 + -4r + r2 = 0 + -11.66666667

Combine like terms: 11.66666667 + -11.66666667 = 0.00000000
0.00000000 + -4r + r2 = 0 + -11.66666667
-4r + r2 = 0 + -11.66666667

Combine like terms: 0 + -11.66666667 = -11.66666667
-4r + r2 = -11.66666667

The r term is -4r.  Take half its coefficient (-2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
-4r + 4 + r2 = -11.66666667 + 4

Reorder the terms:
4 + -4r + r2 = -11.66666667 + 4

Combine like terms: -11.66666667 + 4 = -7.66666667
4 + -4r + r2 = -7.66666667

Factor a perfect square on the left side:
(r + -2)(r + -2) = -7.66666667

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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