188d+157d^2=500

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Solution for 188d+157d^2=500 equation:


Simplifying
188d + 157d2 = 500

Solving
188d + 157d2 = 500

Solving for variable 'd'.

Reorder the terms:
-500 + 188d + 157d2 = 500 + -500

Combine like terms: 500 + -500 = 0
-500 + 188d + 157d2 = 0

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

Divide each side by '157'.
-3.184713376 + 1.197452229d + d2 = 0

Move the constant term to the right:

Add '3.184713376' to each side of the equation.
-3.184713376 + 1.197452229d + 3.184713376 + d2 = 0 + 3.184713376

Reorder the terms:
-3.184713376 + 3.184713376 + 1.197452229d + d2 = 0 + 3.184713376

Combine like terms: -3.184713376 + 3.184713376 = 0.000000000
0.000000000 + 1.197452229d + d2 = 0 + 3.184713376
1.197452229d + d2 = 0 + 3.184713376

Combine like terms: 0 + 3.184713376 = 3.184713376
1.197452229d + d2 = 3.184713376

The d term is 1.197452229d.  Take half its coefficient (0.5987261145).
Square it (0.3584729602) and add it to both sides.

Add '0.3584729602' to each side of the equation.
1.197452229d + 0.3584729602 + d2 = 3.184713376 + 0.3584729602

Reorder the terms:
0.3584729602 + 1.197452229d + d2 = 3.184713376 + 0.3584729602

Combine like terms: 3.184713376 + 0.3584729602 = 3.5431863362
0.3584729602 + 1.197452229d + d2 = 3.5431863362

Factor a perfect square on the left side:
(d + 0.5987261145)(d + 0.5987261145) = 3.5431863362

Calculate the square root of the right side: 1.882335341

Break this problem into two subproblems by setting 
(d + 0.5987261145) equal to 1.882335341 and -1.882335341.

Subproblem 1

d + 0.5987261145 = 1.882335341 Simplifying d + 0.5987261145 = 1.882335341 Reorder the terms: 0.5987261145 + d = 1.882335341 Solving 0.5987261145 + d = 1.882335341 Solving for variable 'd'. Move all terms containing d to the left, all other terms to the right. Add '-0.5987261145' to each side of the equation. 0.5987261145 + -0.5987261145 + d = 1.882335341 + -0.5987261145 Combine like terms: 0.5987261145 + -0.5987261145 = 0.0000000000 0.0000000000 + d = 1.882335341 + -0.5987261145 d = 1.882335341 + -0.5987261145 Combine like terms: 1.882335341 + -0.5987261145 = 1.2836092265 d = 1.2836092265 Simplifying d = 1.2836092265

Subproblem 2

d + 0.5987261145 = -1.882335341 Simplifying d + 0.5987261145 = -1.882335341 Reorder the terms: 0.5987261145 + d = -1.882335341 Solving 0.5987261145 + d = -1.882335341 Solving for variable 'd'. Move all terms containing d to the left, all other terms to the right. Add '-0.5987261145' to each side of the equation. 0.5987261145 + -0.5987261145 + d = -1.882335341 + -0.5987261145 Combine like terms: 0.5987261145 + -0.5987261145 = 0.0000000000 0.0000000000 + d = -1.882335341 + -0.5987261145 d = -1.882335341 + -0.5987261145 Combine like terms: -1.882335341 + -0.5987261145 = -2.4810614555 d = -2.4810614555 Simplifying d = -2.4810614555

Solution

The solution to the problem is based on the solutions from the subproblems. d = {1.2836092265, -2.4810614555}

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