d^2-22d=-27

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Solution for d^2-22d=-27 equation:


Simplifying
d2 + -22d = -27

Reorder the terms:
-22d + d2 = -27

Solving
-22d + d2 = -27

Solving for variable 'd'.

Reorder the terms:
27 + -22d + d2 = -27 + 27

Combine like terms: -27 + 27 = 0
27 + -22d + d2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-27' to each side of the equation.
27 + -22d + -27 + d2 = 0 + -27

Reorder the terms:
27 + -27 + -22d + d2 = 0 + -27

Combine like terms: 27 + -27 = 0
0 + -22d + d2 = 0 + -27
-22d + d2 = 0 + -27

Combine like terms: 0 + -27 = -27
-22d + d2 = -27

The d term is -22d.  Take half its coefficient (-11).
Square it (121) and add it to both sides.

Add '121' to each side of the equation.
-22d + 121 + d2 = -27 + 121

Reorder the terms:
121 + -22d + d2 = -27 + 121

Combine like terms: -27 + 121 = 94
121 + -22d + d2 = 94

Factor a perfect square on the left side:
(d + -11)(d + -11) = 94

Calculate the square root of the right side: 9.695359715

Break this problem into two subproblems by setting 
(d + -11) equal to 9.695359715 and -9.695359715.

Subproblem 1

d + -11 = 9.695359715 Simplifying d + -11 = 9.695359715 Reorder the terms: -11 + d = 9.695359715 Solving -11 + d = 9.695359715 Solving for variable 'd'. Move all terms containing d to the left, all other terms to the right. Add '11' to each side of the equation. -11 + 11 + d = 9.695359715 + 11 Combine like terms: -11 + 11 = 0 0 + d = 9.695359715 + 11 d = 9.695359715 + 11 Combine like terms: 9.695359715 + 11 = 20.695359715 d = 20.695359715 Simplifying d = 20.695359715

Subproblem 2

d + -11 = -9.695359715 Simplifying d + -11 = -9.695359715 Reorder the terms: -11 + d = -9.695359715 Solving -11 + d = -9.695359715 Solving for variable 'd'. Move all terms containing d to the left, all other terms to the right. Add '11' to each side of the equation. -11 + 11 + d = -9.695359715 + 11 Combine like terms: -11 + 11 = 0 0 + d = -9.695359715 + 11 d = -9.695359715 + 11 Combine like terms: -9.695359715 + 11 = 1.304640285 d = 1.304640285 Simplifying d = 1.304640285

Solution

The solution to the problem is based on the solutions from the subproblems. d = {20.695359715, 1.304640285}

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