7x^2-128x+350=0

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Solution for 7x^2-128x+350=0 equation:


Simplifying
7x2 + -128x + 350 = 0

Reorder the terms:
350 + -128x + 7x2 = 0

Solving
350 + -128x + 7x2 = 0

Solving for variable 'x'.

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

Divide each side by '7'.
50 + -18.28571429x + x2 = 0

Move the constant term to the right:

Add '-50' to each side of the equation.
50 + -18.28571429x + -50 + x2 = 0 + -50

Reorder the terms:
50 + -50 + -18.28571429x + x2 = 0 + -50

Combine like terms: 50 + -50 = 0
0 + -18.28571429x + x2 = 0 + -50
-18.28571429x + x2 = 0 + -50

Combine like terms: 0 + -50 = -50
-18.28571429x + x2 = -50

The x term is -18.28571429x.  Take half its coefficient (-9.142857145).
Square it (83.59183677) and add it to both sides.

Add '83.59183677' to each side of the equation.
-18.28571429x + 83.59183677 + x2 = -50 + 83.59183677

Reorder the terms:
83.59183677 + -18.28571429x + x2 = -50 + 83.59183677

Combine like terms: -50 + 83.59183677 = 33.59183677
83.59183677 + -18.28571429x + x2 = 33.59183677

Factor a perfect square on the left side:
(x + -9.142857145)(x + -9.142857145) = 33.59183677

Calculate the square root of the right side: 5.79584651

Break this problem into two subproblems by setting 
(x + -9.142857145) equal to 5.79584651 and -5.79584651.

Subproblem 1

x + -9.142857145 = 5.79584651 Simplifying x + -9.142857145 = 5.79584651 Reorder the terms: -9.142857145 + x = 5.79584651 Solving -9.142857145 + x = 5.79584651 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '9.142857145' to each side of the equation. -9.142857145 + 9.142857145 + x = 5.79584651 + 9.142857145 Combine like terms: -9.142857145 + 9.142857145 = 0.000000000 0.000000000 + x = 5.79584651 + 9.142857145 x = 5.79584651 + 9.142857145 Combine like terms: 5.79584651 + 9.142857145 = 14.938703655 x = 14.938703655 Simplifying x = 14.938703655

Subproblem 2

x + -9.142857145 = -5.79584651 Simplifying x + -9.142857145 = -5.79584651 Reorder the terms: -9.142857145 + x = -5.79584651 Solving -9.142857145 + x = -5.79584651 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '9.142857145' to each side of the equation. -9.142857145 + 9.142857145 + x = -5.79584651 + 9.142857145 Combine like terms: -9.142857145 + 9.142857145 = 0.000000000 0.000000000 + x = -5.79584651 + 9.142857145 x = -5.79584651 + 9.142857145 Combine like terms: -5.79584651 + 9.142857145 = 3.347010635 x = 3.347010635 Simplifying x = 3.347010635

Solution

The solution to the problem is based on the solutions from the subproblems. x = {14.938703655, 3.347010635}

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