4r^2-12r+25=0

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Solution for 4r^2-12r+25=0 equation:


Simplifying
4r2 + -12r + 25 = 0

Reorder the terms:
25 + -12r + 4r2 = 0

Solving
25 + -12r + 4r2 = 0

Solving for variable 'r'.

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

Divide each side by '4'.
6.25 + -3r + r2 = 0

Move the constant term to the right:

Add '-6.25' to each side of the equation.
6.25 + -3r + -6.25 + r2 = 0 + -6.25

Reorder the terms:
6.25 + -6.25 + -3r + r2 = 0 + -6.25

Combine like terms: 6.25 + -6.25 = 0.00
0.00 + -3r + r2 = 0 + -6.25
-3r + r2 = 0 + -6.25

Combine like terms: 0 + -6.25 = -6.25
-3r + r2 = -6.25

The r term is -3r.  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.
-3r + 2.25 + r2 = -6.25 + 2.25

Reorder the terms:
2.25 + -3r + r2 = -6.25 + 2.25

Combine like terms: -6.25 + 2.25 = -4
2.25 + -3r + r2 = -4

Factor a perfect square on the left side:
(r + -1.5)(r + -1.5) = -4

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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