x^2-140x-1200=0

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Solution for x^2-140x-1200=0 equation:


Simplifying
x2 + -140x + -1200 = 0

Reorder the terms:
-1200 + -140x + x2 = 0

Solving
-1200 + -140x + 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 + -140x + 1200 + x2 = 0 + 1200

Reorder the terms:
-1200 + 1200 + -140x + x2 = 0 + 1200

Combine like terms: -1200 + 1200 = 0
0 + -140x + x2 = 0 + 1200
-140x + x2 = 0 + 1200

Combine like terms: 0 + 1200 = 1200
-140x + x2 = 1200

The x term is -140x.  Take half its coefficient (-70).
Square it (4900) and add it to both sides.

Add '4900' to each side of the equation.
-140x + 4900 + x2 = 1200 + 4900

Reorder the terms:
4900 + -140x + x2 = 1200 + 4900

Combine like terms: 1200 + 4900 = 6100
4900 + -140x + x2 = 6100

Factor a perfect square on the left side:
(x + -70)(x + -70) = 6100

Calculate the square root of the right side: 78.102496759

Break this problem into two subproblems by setting 
(x + -70) equal to 78.102496759 and -78.102496759.

Subproblem 1

x + -70 = 78.102496759 Simplifying x + -70 = 78.102496759 Reorder the terms: -70 + x = 78.102496759 Solving -70 + x = 78.102496759 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '70' to each side of the equation. -70 + 70 + x = 78.102496759 + 70 Combine like terms: -70 + 70 = 0 0 + x = 78.102496759 + 70 x = 78.102496759 + 70 Combine like terms: 78.102496759 + 70 = 148.102496759 x = 148.102496759 Simplifying x = 148.102496759

Subproblem 2

x + -70 = -78.102496759 Simplifying x + -70 = -78.102496759 Reorder the terms: -70 + x = -78.102496759 Solving -70 + x = -78.102496759 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '70' to each side of the equation. -70 + 70 + x = -78.102496759 + 70 Combine like terms: -70 + 70 = 0 0 + x = -78.102496759 + 70 x = -78.102496759 + 70 Combine like terms: -78.102496759 + 70 = -8.102496759 x = -8.102496759 Simplifying x = -8.102496759

Solution

The solution to the problem is based on the solutions from the subproblems. x = {148.102496759, -8.102496759}

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