-.05d^2+16.9d=34

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Solution for -.05d^2+16.9d=34 equation:


Simplifying
-0.05d2 + 16.9d = 34

Reorder the terms:
16.9d + -0.05d2 = 34

Solving
16.9d + -0.05d2 = 34

Solving for variable 'd'.

Reorder the terms:
-34 + 16.9d + -0.05d2 = 34 + -34

Combine like terms: 34 + -34 = 0
-34 + 16.9d + -0.05d2 = 0

Begin completing the square.  Divide all terms by
-0.05 the coefficient of the squared term: 

Divide each side by '-0.05'.
680 + -338d + d2 = 0

Move the constant term to the right:

Add '-680' to each side of the equation.
680 + -338d + -680 + d2 = 0 + -680

Reorder the terms:
680 + -680 + -338d + d2 = 0 + -680

Combine like terms: 680 + -680 = 0
0 + -338d + d2 = 0 + -680
-338d + d2 = 0 + -680

Combine like terms: 0 + -680 = -680
-338d + d2 = -680

The d term is -338d.  Take half its coefficient (-169).
Square it (28561) and add it to both sides.

Add '28561' to each side of the equation.
-338d + 28561 + d2 = -680 + 28561

Reorder the terms:
28561 + -338d + d2 = -680 + 28561

Combine like terms: -680 + 28561 = 27881
28561 + -338d + d2 = 27881

Factor a perfect square on the left side:
(d + -169)(d + -169) = 27881

Calculate the square root of the right side: 166.976046186

Break this problem into two subproblems by setting 
(d + -169) equal to 166.976046186 and -166.976046186.

Subproblem 1

d + -169 = 166.976046186 Simplifying d + -169 = 166.976046186 Reorder the terms: -169 + d = 166.976046186 Solving -169 + d = 166.976046186 Solving for variable 'd'. Move all terms containing d to the left, all other terms to the right. Add '169' to each side of the equation. -169 + 169 + d = 166.976046186 + 169 Combine like terms: -169 + 169 = 0 0 + d = 166.976046186 + 169 d = 166.976046186 + 169 Combine like terms: 166.976046186 + 169 = 335.976046186 d = 335.976046186 Simplifying d = 335.976046186

Subproblem 2

d + -169 = -166.976046186 Simplifying d + -169 = -166.976046186 Reorder the terms: -169 + d = -166.976046186 Solving -169 + d = -166.976046186 Solving for variable 'd'. Move all terms containing d to the left, all other terms to the right. Add '169' to each side of the equation. -169 + 169 + d = -166.976046186 + 169 Combine like terms: -169 + 169 = 0 0 + d = -166.976046186 + 169 d = -166.976046186 + 169 Combine like terms: -166.976046186 + 169 = 2.023953814 d = 2.023953814 Simplifying d = 2.023953814

Solution

The solution to the problem is based on the solutions from the subproblems. d = {335.976046186, 2.023953814}

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