r^2-19r+14=

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Solution for r^2-19r+14= equation:


Simplifying
r2 + -19r + 14 = 0

Reorder the terms:
14 + -19r + r2 = 0

Solving
14 + -19r + r2 = 0

Solving for variable 'r'.

Begin completing the square.

Move the constant term to the right:

Add '-14' to each side of the equation.
14 + -19r + -14 + r2 = 0 + -14

Reorder the terms:
14 + -14 + -19r + r2 = 0 + -14

Combine like terms: 14 + -14 = 0
0 + -19r + r2 = 0 + -14
-19r + r2 = 0 + -14

Combine like terms: 0 + -14 = -14
-19r + r2 = -14

The r term is -19r.  Take half its coefficient (-9.5).
Square it (90.25) and add it to both sides.

Add '90.25' to each side of the equation.
-19r + 90.25 + r2 = -14 + 90.25

Reorder the terms:
90.25 + -19r + r2 = -14 + 90.25

Combine like terms: -14 + 90.25 = 76.25
90.25 + -19r + r2 = 76.25

Factor a perfect square on the left side:
(r + -9.5)(r + -9.5) = 76.25

Calculate the square root of the right side: 8.732124598

Break this problem into two subproblems by setting 
(r + -9.5) equal to 8.732124598 and -8.732124598.

Subproblem 1

r + -9.5 = 8.732124598 Simplifying r + -9.5 = 8.732124598 Reorder the terms: -9.5 + r = 8.732124598 Solving -9.5 + r = 8.732124598 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '9.5' to each side of the equation. -9.5 + 9.5 + r = 8.732124598 + 9.5 Combine like terms: -9.5 + 9.5 = 0.0 0.0 + r = 8.732124598 + 9.5 r = 8.732124598 + 9.5 Combine like terms: 8.732124598 + 9.5 = 18.232124598 r = 18.232124598 Simplifying r = 18.232124598

Subproblem 2

r + -9.5 = -8.732124598 Simplifying r + -9.5 = -8.732124598 Reorder the terms: -9.5 + r = -8.732124598 Solving -9.5 + r = -8.732124598 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '9.5' to each side of the equation. -9.5 + 9.5 + r = -8.732124598 + 9.5 Combine like terms: -9.5 + 9.5 = 0.0 0.0 + r = -8.732124598 + 9.5 r = -8.732124598 + 9.5 Combine like terms: -8.732124598 + 9.5 = 0.767875402 r = 0.767875402 Simplifying r = 0.767875402

Solution

The solution to the problem is based on the solutions from the subproblems. r = {18.232124598, 0.767875402}

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