d^2-18d+29=0

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Solution for d^2-18d+29=0 equation:


Simplifying
d2 + -18d + 29 = 0

Reorder the terms:
29 + -18d + d2 = 0

Solving
29 + -18d + d2 = 0

Solving for variable 'd'.

Begin completing the square.

Move the constant term to the right:

Add '-29' to each side of the equation.
29 + -18d + -29 + d2 = 0 + -29

Reorder the terms:
29 + -29 + -18d + d2 = 0 + -29

Combine like terms: 29 + -29 = 0
0 + -18d + d2 = 0 + -29
-18d + d2 = 0 + -29

Combine like terms: 0 + -29 = -29
-18d + d2 = -29

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

Add '81' to each side of the equation.
-18d + 81 + d2 = -29 + 81

Reorder the terms:
81 + -18d + d2 = -29 + 81

Combine like terms: -29 + 81 = 52
81 + -18d + d2 = 52

Factor a perfect square on the left side:
(d + -9)(d + -9) = 52

Calculate the square root of the right side: 7.211102551

Break this problem into two subproblems by setting 
(d + -9) equal to 7.211102551 and -7.211102551.

Subproblem 1

d + -9 = 7.211102551 Simplifying d + -9 = 7.211102551 Reorder the terms: -9 + d = 7.211102551 Solving -9 + d = 7.211102551 Solving for variable 'd'. Move all terms containing d to the left, all other terms to the right. Add '9' to each side of the equation. -9 + 9 + d = 7.211102551 + 9 Combine like terms: -9 + 9 = 0 0 + d = 7.211102551 + 9 d = 7.211102551 + 9 Combine like terms: 7.211102551 + 9 = 16.211102551 d = 16.211102551 Simplifying d = 16.211102551

Subproblem 2

d + -9 = -7.211102551 Simplifying d + -9 = -7.211102551 Reorder the terms: -9 + d = -7.211102551 Solving -9 + d = -7.211102551 Solving for variable 'd'. Move all terms containing d to the left, all other terms to the right. Add '9' to each side of the equation. -9 + 9 + d = -7.211102551 + 9 Combine like terms: -9 + 9 = 0 0 + d = -7.211102551 + 9 d = -7.211102551 + 9 Combine like terms: -7.211102551 + 9 = 1.788897449 d = 1.788897449 Simplifying d = 1.788897449

Solution

The solution to the problem is based on the solutions from the subproblems. d = {16.211102551, 1.788897449}

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