X^2+15X=9950

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Solution for X^2+15X=9950 equation:


Simplifying
X2 + 15X = 9950

Reorder the terms:
15X + X2 = 9950

Solving
15X + X2 = 9950

Solving for variable 'X'.

Reorder the terms:
-9950 + 15X + X2 = 9950 + -9950

Combine like terms: 9950 + -9950 = 0
-9950 + 15X + X2 = 0

Begin completing the square.

Move the constant term to the right:

Add '9950' to each side of the equation.
-9950 + 15X + 9950 + X2 = 0 + 9950

Reorder the terms:
-9950 + 9950 + 15X + X2 = 0 + 9950

Combine like terms: -9950 + 9950 = 0
0 + 15X + X2 = 0 + 9950
15X + X2 = 0 + 9950

Combine like terms: 0 + 9950 = 9950
15X + X2 = 9950

The X term is 15X.  Take half its coefficient (7.5).
Square it (56.25) and add it to both sides.

Add '56.25' to each side of the equation.
15X + 56.25 + X2 = 9950 + 56.25

Reorder the terms:
56.25 + 15X + X2 = 9950 + 56.25

Combine like terms: 9950 + 56.25 = 10006.25
56.25 + 15X + X2 = 10006.25

Factor a perfect square on the left side:
(X + 7.5)(X + 7.5) = 10006.25

Calculate the square root of the right side: 100.031245119

Break this problem into two subproblems by setting 
(X + 7.5) equal to 100.031245119 and -100.031245119.

Subproblem 1

X + 7.5 = 100.031245119 Simplifying X + 7.5 = 100.031245119 Reorder the terms: 7.5 + X = 100.031245119 Solving 7.5 + X = 100.031245119 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '-7.5' to each side of the equation. 7.5 + -7.5 + X = 100.031245119 + -7.5 Combine like terms: 7.5 + -7.5 = 0.0 0.0 + X = 100.031245119 + -7.5 X = 100.031245119 + -7.5 Combine like terms: 100.031245119 + -7.5 = 92.531245119 X = 92.531245119 Simplifying X = 92.531245119

Subproblem 2

X + 7.5 = -100.031245119 Simplifying X + 7.5 = -100.031245119 Reorder the terms: 7.5 + X = -100.031245119 Solving 7.5 + X = -100.031245119 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '-7.5' to each side of the equation. 7.5 + -7.5 + X = -100.031245119 + -7.5 Combine like terms: 7.5 + -7.5 = 0.0 0.0 + X = -100.031245119 + -7.5 X = -100.031245119 + -7.5 Combine like terms: -100.031245119 + -7.5 = -107.531245119 X = -107.531245119 Simplifying X = -107.531245119

Solution

The solution to the problem is based on the solutions from the subproblems. X = {92.531245119, -107.531245119}

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