R^2-18R-29=8

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Solution for R^2-18R-29=8 equation:


Simplifying
R2 + -18R + -29 = 8

Reorder the terms:
-29 + -18R + R2 = 8

Solving
-29 + -18R + R2 = 8

Solving for variable 'R'.

Reorder the terms:
-29 + -8 + -18R + R2 = 8 + -8

Combine like terms: -29 + -8 = -37
-37 + -18R + R2 = 8 + -8

Combine like terms: 8 + -8 = 0
-37 + -18R + R2 = 0

Begin completing the square.

Move the constant term to the right:

Add '37' to each side of the equation.
-37 + -18R + 37 + R2 = 0 + 37

Reorder the terms:
-37 + 37 + -18R + R2 = 0 + 37

Combine like terms: -37 + 37 = 0
0 + -18R + R2 = 0 + 37
-18R + R2 = 0 + 37

Combine like terms: 0 + 37 = 37
-18R + R2 = 37

The R term is -18R.  Take half its coefficient (-9).
Square it (81) and add it to both sides.

Add '81' to each side of the equation.
-18R + 81 + R2 = 37 + 81

Reorder the terms:
81 + -18R + R2 = 37 + 81

Combine like terms: 37 + 81 = 118
81 + -18R + R2 = 118

Factor a perfect square on the left side:
(R + -9)(R + -9) = 118

Calculate the square root of the right side: 10.862780491

Break this problem into two subproblems by setting 
(R + -9) equal to 10.862780491 and -10.862780491.

Subproblem 1

R + -9 = 10.862780491 Simplifying R + -9 = 10.862780491 Reorder the terms: -9 + R = 10.862780491 Solving -9 + R = 10.862780491 Solving for variable 'R'. Move all terms containing R to the left, all other terms to the right. Add '9' to each side of the equation. -9 + 9 + R = 10.862780491 + 9 Combine like terms: -9 + 9 = 0 0 + R = 10.862780491 + 9 R = 10.862780491 + 9 Combine like terms: 10.862780491 + 9 = 19.862780491 R = 19.862780491 Simplifying R = 19.862780491

Subproblem 2

R + -9 = -10.862780491 Simplifying R + -9 = -10.862780491 Reorder the terms: -9 + R = -10.862780491 Solving -9 + R = -10.862780491 Solving for variable 'R'. Move all terms containing R to the left, all other terms to the right. Add '9' to each side of the equation. -9 + 9 + R = -10.862780491 + 9 Combine like terms: -9 + 9 = 0 0 + R = -10.862780491 + 9 R = -10.862780491 + 9 Combine like terms: -10.862780491 + 9 = -1.862780491 R = -1.862780491 Simplifying R = -1.862780491

Solution

The solution to the problem is based on the solutions from the subproblems. R = {19.862780491, -1.862780491}

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