u^2-22u=-43

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Solution for u^2-22u=-43 equation:


Simplifying
u2 + -22u = -43

Reorder the terms:
-22u + u2 = -43

Solving
-22u + u2 = -43

Solving for variable 'u'.

Reorder the terms:
43 + -22u + u2 = -43 + 43

Combine like terms: -43 + 43 = 0
43 + -22u + u2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-43' to each side of the equation.
43 + -22u + -43 + u2 = 0 + -43

Reorder the terms:
43 + -43 + -22u + u2 = 0 + -43

Combine like terms: 43 + -43 = 0
0 + -22u + u2 = 0 + -43
-22u + u2 = 0 + -43

Combine like terms: 0 + -43 = -43
-22u + u2 = -43

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

Add '121' to each side of the equation.
-22u + 121 + u2 = -43 + 121

Reorder the terms:
121 + -22u + u2 = -43 + 121

Combine like terms: -43 + 121 = 78
121 + -22u + u2 = 78

Factor a perfect square on the left side:
(u + -11)(u + -11) = 78

Calculate the square root of the right side: 8.831760866

Break this problem into two subproblems by setting 
(u + -11) equal to 8.831760866 and -8.831760866.

Subproblem 1

u + -11 = 8.831760866 Simplifying u + -11 = 8.831760866 Reorder the terms: -11 + u = 8.831760866 Solving -11 + u = 8.831760866 Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '11' to each side of the equation. -11 + 11 + u = 8.831760866 + 11 Combine like terms: -11 + 11 = 0 0 + u = 8.831760866 + 11 u = 8.831760866 + 11 Combine like terms: 8.831760866 + 11 = 19.831760866 u = 19.831760866 Simplifying u = 19.831760866

Subproblem 2

u + -11 = -8.831760866 Simplifying u + -11 = -8.831760866 Reorder the terms: -11 + u = -8.831760866 Solving -11 + u = -8.831760866 Solving for variable 'u'. Move all terms containing u to the left, all other terms to the right. Add '11' to each side of the equation. -11 + 11 + u = -8.831760866 + 11 Combine like terms: -11 + 11 = 0 0 + u = -8.831760866 + 11 u = -8.831760866 + 11 Combine like terms: -8.831760866 + 11 = 2.168239134 u = 2.168239134 Simplifying u = 2.168239134

Solution

The solution to the problem is based on the solutions from the subproblems. u = {19.831760866, 2.168239134}

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