X^2+5X-1200=0

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Solution for X^2+5X-1200=0 equation:


Simplifying
X2 + 5X + -1200 = 0

Reorder the terms:
-1200 + 5X + X2 = 0

Solving
-1200 + 5X + X2 = 0

Solving for variable 'X'.

Begin completing the square.

Move the constant term to the right:

Add '1200' to each side of the equation.
-1200 + 5X + 1200 + X2 = 0 + 1200

Reorder the terms:
-1200 + 1200 + 5X + X2 = 0 + 1200

Combine like terms: -1200 + 1200 = 0
0 + 5X + X2 = 0 + 1200
5X + X2 = 0 + 1200

Combine like terms: 0 + 1200 = 1200
5X + X2 = 1200

The X term is 5X.  Take half its coefficient (2.5).
Square it (6.25) and add it to both sides.

Add '6.25' to each side of the equation.
5X + 6.25 + X2 = 1200 + 6.25

Reorder the terms:
6.25 + 5X + X2 = 1200 + 6.25

Combine like terms: 1200 + 6.25 = 1206.25
6.25 + 5X + X2 = 1206.25

Factor a perfect square on the left side:
(X + 2.5)(X + 2.5) = 1206.25

Calculate the square root of the right side: 34.731109974

Break this problem into two subproblems by setting 
(X + 2.5) equal to 34.731109974 and -34.731109974.

Subproblem 1

X + 2.5 = 34.731109974 Simplifying X + 2.5 = 34.731109974 Reorder the terms: 2.5 + X = 34.731109974 Solving 2.5 + X = 34.731109974 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '-2.5' to each side of the equation. 2.5 + -2.5 + X = 34.731109974 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + X = 34.731109974 + -2.5 X = 34.731109974 + -2.5 Combine like terms: 34.731109974 + -2.5 = 32.231109974 X = 32.231109974 Simplifying X = 32.231109974

Subproblem 2

X + 2.5 = -34.731109974 Simplifying X + 2.5 = -34.731109974 Reorder the terms: 2.5 + X = -34.731109974 Solving 2.5 + X = -34.731109974 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '-2.5' to each side of the equation. 2.5 + -2.5 + X = -34.731109974 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + X = -34.731109974 + -2.5 X = -34.731109974 + -2.5 Combine like terms: -34.731109974 + -2.5 = -37.231109974 X = -37.231109974 Simplifying X = -37.231109974

Solution

The solution to the problem is based on the solutions from the subproblems. X = {32.231109974, -37.231109974}

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