(r+2)(r+2)=14

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Solution for (r+2)(r+2)=14 equation:


Simplifying
(r + 2)(r + 2) = 14

Reorder the terms:
(2 + r)(r + 2) = 14

Reorder the terms:
(2 + r)(2 + r) = 14

Multiply (2 + r) * (2 + r)
(2(2 + r) + r(2 + r)) = 14
((2 * 2 + r * 2) + r(2 + r)) = 14
((4 + 2r) + r(2 + r)) = 14
(4 + 2r + (2 * r + r * r)) = 14
(4 + 2r + (2r + r2)) = 14

Combine like terms: 2r + 2r = 4r
(4 + 4r + r2) = 14

Solving
4 + 4r + r2 = 14

Solving for variable 'r'.

Reorder the terms:
4 + -14 + 4r + r2 = 14 + -14

Combine like terms: 4 + -14 = -10
-10 + 4r + r2 = 14 + -14

Combine like terms: 14 + -14 = 0
-10 + 4r + r2 = 0

Begin completing the square.

Move the constant term to the right:

Add '10' to each side of the equation.
-10 + 4r + 10 + r2 = 0 + 10

Reorder the terms:
-10 + 10 + 4r + r2 = 0 + 10

Combine like terms: -10 + 10 = 0
0 + 4r + r2 = 0 + 10
4r + r2 = 0 + 10

Combine like terms: 0 + 10 = 10
4r + r2 = 10

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 = 10 + 4

Reorder the terms:
4 + 4r + r2 = 10 + 4

Combine like terms: 10 + 4 = 14
4 + 4r + r2 = 14

Factor a perfect square on the left side:
(r + 2)(r + 2) = 14

Calculate the square root of the right side: 3.741657387

Break this problem into two subproblems by setting 
(r + 2) equal to 3.741657387 and -3.741657387.

Subproblem 1

r + 2 = 3.741657387 Simplifying r + 2 = 3.741657387 Reorder the terms: 2 + r = 3.741657387 Solving 2 + r = 3.741657387 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + r = 3.741657387 + -2 Combine like terms: 2 + -2 = 0 0 + r = 3.741657387 + -2 r = 3.741657387 + -2 Combine like terms: 3.741657387 + -2 = 1.741657387 r = 1.741657387 Simplifying r = 1.741657387

Subproblem 2

r + 2 = -3.741657387 Simplifying r + 2 = -3.741657387 Reorder the terms: 2 + r = -3.741657387 Solving 2 + r = -3.741657387 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + r = -3.741657387 + -2 Combine like terms: 2 + -2 = 0 0 + r = -3.741657387 + -2 r = -3.741657387 + -2 Combine like terms: -3.741657387 + -2 = -5.741657387 r = -5.741657387 Simplifying r = -5.741657387

Solution

The solution to the problem is based on the solutions from the subproblems. r = {1.741657387, -5.741657387}

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