r^2-12r+35=62

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Solution for r^2-12r+35=62 equation:


Simplifying
r2 + -12r + 35 = 62

Reorder the terms:
35 + -12r + r2 = 62

Solving
35 + -12r + r2 = 62

Solving for variable 'r'.

Reorder the terms:
35 + -62 + -12r + r2 = 62 + -62

Combine like terms: 35 + -62 = -27
-27 + -12r + r2 = 62 + -62

Combine like terms: 62 + -62 = 0
-27 + -12r + r2 = 0

Begin completing the square.

Move the constant term to the right:

Add '27' to each side of the equation.
-27 + -12r + 27 + r2 = 0 + 27

Reorder the terms:
-27 + 27 + -12r + r2 = 0 + 27

Combine like terms: -27 + 27 = 0
0 + -12r + r2 = 0 + 27
-12r + r2 = 0 + 27

Combine like terms: 0 + 27 = 27
-12r + r2 = 27

The r term is -12r.  Take half its coefficient (-6).
Square it (36) and add it to both sides.

Add '36' to each side of the equation.
-12r + 36 + r2 = 27 + 36

Reorder the terms:
36 + -12r + r2 = 27 + 36

Combine like terms: 27 + 36 = 63
36 + -12r + r2 = 63

Factor a perfect square on the left side:
(r + -6)(r + -6) = 63

Calculate the square root of the right side: 7.937253933

Break this problem into two subproblems by setting 
(r + -6) equal to 7.937253933 and -7.937253933.

Subproblem 1

r + -6 = 7.937253933 Simplifying r + -6 = 7.937253933 Reorder the terms: -6 + r = 7.937253933 Solving -6 + r = 7.937253933 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '6' to each side of the equation. -6 + 6 + r = 7.937253933 + 6 Combine like terms: -6 + 6 = 0 0 + r = 7.937253933 + 6 r = 7.937253933 + 6 Combine like terms: 7.937253933 + 6 = 13.937253933 r = 13.937253933 Simplifying r = 13.937253933

Subproblem 2

r + -6 = -7.937253933 Simplifying r + -6 = -7.937253933 Reorder the terms: -6 + r = -7.937253933 Solving -6 + r = -7.937253933 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '6' to each side of the equation. -6 + 6 + r = -7.937253933 + 6 Combine like terms: -6 + 6 = 0 0 + r = -7.937253933 + 6 r = -7.937253933 + 6 Combine like terms: -7.937253933 + 6 = -1.937253933 r = -1.937253933 Simplifying r = -1.937253933

Solution

The solution to the problem is based on the solutions from the subproblems. r = {13.937253933, -1.937253933}

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