x^2-7x-1000=0

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Solution for x^2-7x-1000=0 equation:


Simplifying
x2 + -7x + -1000 = 0

Reorder the terms:
-1000 + -7x + x2 = 0

Solving
-1000 + -7x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '1000' to each side of the equation.
-1000 + -7x + 1000 + x2 = 0 + 1000

Reorder the terms:
-1000 + 1000 + -7x + x2 = 0 + 1000

Combine like terms: -1000 + 1000 = 0
0 + -7x + x2 = 0 + 1000
-7x + x2 = 0 + 1000

Combine like terms: 0 + 1000 = 1000
-7x + x2 = 1000

The x term is -7x.  Take half its coefficient (-3.5).
Square it (12.25) and add it to both sides.

Add '12.25' to each side of the equation.
-7x + 12.25 + x2 = 1000 + 12.25

Reorder the terms:
12.25 + -7x + x2 = 1000 + 12.25

Combine like terms: 1000 + 12.25 = 1012.25
12.25 + -7x + x2 = 1012.25

Factor a perfect square on the left side:
(x + -3.5)(x + -3.5) = 1012.25

Calculate the square root of the right side: 31.81587654

Break this problem into two subproblems by setting 
(x + -3.5) equal to 31.81587654 and -31.81587654.

Subproblem 1

x + -3.5 = 31.81587654 Simplifying x + -3.5 = 31.81587654 Reorder the terms: -3.5 + x = 31.81587654 Solving -3.5 + x = 31.81587654 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.5' to each side of the equation. -3.5 + 3.5 + x = 31.81587654 + 3.5 Combine like terms: -3.5 + 3.5 = 0.0 0.0 + x = 31.81587654 + 3.5 x = 31.81587654 + 3.5 Combine like terms: 31.81587654 + 3.5 = 35.31587654 x = 35.31587654 Simplifying x = 35.31587654

Subproblem 2

x + -3.5 = -31.81587654 Simplifying x + -3.5 = -31.81587654 Reorder the terms: -3.5 + x = -31.81587654 Solving -3.5 + x = -31.81587654 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.5' to each side of the equation. -3.5 + 3.5 + x = -31.81587654 + 3.5 Combine like terms: -3.5 + 3.5 = 0.0 0.0 + x = -31.81587654 + 3.5 x = -31.81587654 + 3.5 Combine like terms: -31.81587654 + 3.5 = -28.31587654 x = -28.31587654 Simplifying x = -28.31587654

Solution

The solution to the problem is based on the solutions from the subproblems. x = {35.31587654, -28.31587654}

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