d^2+100d-6250=0

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Solution for d^2+100d-6250=0 equation:


Simplifying
d2 + 100d + -6250 = 0

Reorder the terms:
-6250 + 100d + d2 = 0

Solving
-6250 + 100d + d2 = 0

Solving for variable 'd'.

Begin completing the square.

Move the constant term to the right:

Add '6250' to each side of the equation.
-6250 + 100d + 6250 + d2 = 0 + 6250

Reorder the terms:
-6250 + 6250 + 100d + d2 = 0 + 6250

Combine like terms: -6250 + 6250 = 0
0 + 100d + d2 = 0 + 6250
100d + d2 = 0 + 6250

Combine like terms: 0 + 6250 = 6250
100d + d2 = 6250

The d term is 100d.  Take half its coefficient (50).
Square it (2500) and add it to both sides.

Add '2500' to each side of the equation.
100d + 2500 + d2 = 6250 + 2500

Reorder the terms:
2500 + 100d + d2 = 6250 + 2500

Combine like terms: 6250 + 2500 = 8750
2500 + 100d + d2 = 8750

Factor a perfect square on the left side:
(d + 50)(d + 50) = 8750

Calculate the square root of the right side: 93.541434669

Break this problem into two subproblems by setting 
(d + 50) equal to 93.541434669 and -93.541434669.

Subproblem 1

d + 50 = 93.541434669 Simplifying d + 50 = 93.541434669 Reorder the terms: 50 + d = 93.541434669 Solving 50 + d = 93.541434669 Solving for variable 'd'. Move all terms containing d to the left, all other terms to the right. Add '-50' to each side of the equation. 50 + -50 + d = 93.541434669 + -50 Combine like terms: 50 + -50 = 0 0 + d = 93.541434669 + -50 d = 93.541434669 + -50 Combine like terms: 93.541434669 + -50 = 43.541434669 d = 43.541434669 Simplifying d = 43.541434669

Subproblem 2

d + 50 = -93.541434669 Simplifying d + 50 = -93.541434669 Reorder the terms: 50 + d = -93.541434669 Solving 50 + d = -93.541434669 Solving for variable 'd'. Move all terms containing d to the left, all other terms to the right. Add '-50' to each side of the equation. 50 + -50 + d = -93.541434669 + -50 Combine like terms: 50 + -50 = 0 0 + d = -93.541434669 + -50 d = -93.541434669 + -50 Combine like terms: -93.541434669 + -50 = -143.541434669 d = -143.541434669 Simplifying d = -143.541434669

Solution

The solution to the problem is based on the solutions from the subproblems. d = {43.541434669, -143.541434669}

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