1000=x^2+12x+42

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Solution for 1000=x^2+12x+42 equation:


Simplifying
1000 = x2 + 12x + 42

Reorder the terms:
1000 = 42 + 12x + x2

Solving
1000 = 42 + 12x + x2

Solving for variable 'x'.

Combine like terms: 1000 + -42 = 958
958 + -12x + -1x2 = 42 + 12x + x2 + -42 + -12x + -1x2

Reorder the terms:
958 + -12x + -1x2 = 42 + -42 + 12x + -12x + x2 + -1x2

Combine like terms: 42 + -42 = 0
958 + -12x + -1x2 = 0 + 12x + -12x + x2 + -1x2
958 + -12x + -1x2 = 12x + -12x + x2 + -1x2

Combine like terms: 12x + -12x = 0
958 + -12x + -1x2 = 0 + x2 + -1x2
958 + -12x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
958 + -12x + -1x2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-958 + 12x + x2 = 0

Move the constant term to the right:

Add '958' to each side of the equation.
-958 + 12x + 958 + x2 = 0 + 958

Reorder the terms:
-958 + 958 + 12x + x2 = 0 + 958

Combine like terms: -958 + 958 = 0
0 + 12x + x2 = 0 + 958
12x + x2 = 0 + 958

Combine like terms: 0 + 958 = 958
12x + x2 = 958

The x term is 12x.  Take half its coefficient (6).
Square it (36) and add it to both sides.

Add '36' to each side of the equation.
12x + 36 + x2 = 958 + 36

Reorder the terms:
36 + 12x + x2 = 958 + 36

Combine like terms: 958 + 36 = 994
36 + 12x + x2 = 994

Factor a perfect square on the left side:
(x + 6)(x + 6) = 994

Calculate the square root of the right side: 31.527765541

Break this problem into two subproblems by setting 
(x + 6) equal to 31.527765541 and -31.527765541.

Subproblem 1

x + 6 = 31.527765541 Simplifying x + 6 = 31.527765541 Reorder the terms: 6 + x = 31.527765541 Solving 6 + x = 31.527765541 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-6' to each side of the equation. 6 + -6 + x = 31.527765541 + -6 Combine like terms: 6 + -6 = 0 0 + x = 31.527765541 + -6 x = 31.527765541 + -6 Combine like terms: 31.527765541 + -6 = 25.527765541 x = 25.527765541 Simplifying x = 25.527765541

Subproblem 2

x + 6 = -31.527765541 Simplifying x + 6 = -31.527765541 Reorder the terms: 6 + x = -31.527765541 Solving 6 + x = -31.527765541 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-6' to each side of the equation. 6 + -6 + x = -31.527765541 + -6 Combine like terms: 6 + -6 = 0 0 + x = -31.527765541 + -6 x = -31.527765541 + -6 Combine like terms: -31.527765541 + -6 = -37.527765541 x = -37.527765541 Simplifying x = -37.527765541

Solution

The solution to the problem is based on the solutions from the subproblems. x = {25.527765541, -37.527765541}

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