x^2-700x+1400=0

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Solution for x^2-700x+1400=0 equation:


Simplifying
x2 + -700x + 1400 = 0

Reorder the terms:
1400 + -700x + x2 = 0

Solving
1400 + -700x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '-1400' to each side of the equation.
1400 + -700x + -1400 + x2 = 0 + -1400

Reorder the terms:
1400 + -1400 + -700x + x2 = 0 + -1400

Combine like terms: 1400 + -1400 = 0
0 + -700x + x2 = 0 + -1400
-700x + x2 = 0 + -1400

Combine like terms: 0 + -1400 = -1400
-700x + x2 = -1400

The x term is -700x.  Take half its coefficient (-350).
Square it (122500) and add it to both sides.

Add '122500' to each side of the equation.
-700x + 122500 + x2 = -1400 + 122500

Reorder the terms:
122500 + -700x + x2 = -1400 + 122500

Combine like terms: -1400 + 122500 = 121100
122500 + -700x + x2 = 121100

Factor a perfect square on the left side:
(x + -350)(x + -350) = 121100

Calculate the square root of the right side: 347.994252826

Break this problem into two subproblems by setting 
(x + -350) equal to 347.994252826 and -347.994252826.

Subproblem 1

x + -350 = 347.994252826 Simplifying x + -350 = 347.994252826 Reorder the terms: -350 + x = 347.994252826 Solving -350 + x = 347.994252826 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '350' to each side of the equation. -350 + 350 + x = 347.994252826 + 350 Combine like terms: -350 + 350 = 0 0 + x = 347.994252826 + 350 x = 347.994252826 + 350 Combine like terms: 347.994252826 + 350 = 697.994252826 x = 697.994252826 Simplifying x = 697.994252826

Subproblem 2

x + -350 = -347.994252826 Simplifying x + -350 = -347.994252826 Reorder the terms: -350 + x = -347.994252826 Solving -350 + x = -347.994252826 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '350' to each side of the equation. -350 + 350 + x = -347.994252826 + 350 Combine like terms: -350 + 350 = 0 0 + x = -347.994252826 + 350 x = -347.994252826 + 350 Combine like terms: -347.994252826 + 350 = 2.005747174 x = 2.005747174 Simplifying x = 2.005747174

Solution

The solution to the problem is based on the solutions from the subproblems. x = {697.994252826, 2.005747174}

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