7x^2-x=46

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Solution for 7x^2-x=46 equation:


Simplifying
7x2 + -1x = 46

Reorder the terms:
-1x + 7x2 = 46

Solving
-1x + 7x2 = 46

Solving for variable 'x'.

Reorder the terms:
-46 + -1x + 7x2 = 46 + -46

Combine like terms: 46 + -46 = 0
-46 + -1x + 7x2 = 0

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

Divide each side by '7'.
-6.571428571 + -0.1428571429x + x2 = 0

Move the constant term to the right:

Add '6.571428571' to each side of the equation.
-6.571428571 + -0.1428571429x + 6.571428571 + x2 = 0 + 6.571428571

Reorder the terms:
-6.571428571 + 6.571428571 + -0.1428571429x + x2 = 0 + 6.571428571

Combine like terms: -6.571428571 + 6.571428571 = 0.000000000
0.000000000 + -0.1428571429x + x2 = 0 + 6.571428571
-0.1428571429x + x2 = 0 + 6.571428571

Combine like terms: 0 + 6.571428571 = 6.571428571
-0.1428571429x + x2 = 6.571428571

The x term is -0.1428571429x.  Take half its coefficient (-0.07142857145).
Square it (0.005102040819) and add it to both sides.

Add '0.005102040819' to each side of the equation.
-0.1428571429x + 0.005102040819 + x2 = 6.571428571 + 0.005102040819

Reorder the terms:
0.005102040819 + -0.1428571429x + x2 = 6.571428571 + 0.005102040819

Combine like terms: 6.571428571 + 0.005102040819 = 6.576530611819
0.005102040819 + -0.1428571429x + x2 = 6.576530611819

Factor a perfect square on the left side:
(x + -0.07142857145)(x + -0.07142857145) = 6.576530611819

Calculate the square root of the right side: 2.564474724

Break this problem into two subproblems by setting 
(x + -0.07142857145) equal to 2.564474724 and -2.564474724.

Subproblem 1

x + -0.07142857145 = 2.564474724 Simplifying x + -0.07142857145 = 2.564474724 Reorder the terms: -0.07142857145 + x = 2.564474724 Solving -0.07142857145 + x = 2.564474724 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.07142857145' to each side of the equation. -0.07142857145 + 0.07142857145 + x = 2.564474724 + 0.07142857145 Combine like terms: -0.07142857145 + 0.07142857145 = 0.00000000000 0.00000000000 + x = 2.564474724 + 0.07142857145 x = 2.564474724 + 0.07142857145 Combine like terms: 2.564474724 + 0.07142857145 = 2.63590329545 x = 2.63590329545 Simplifying x = 2.63590329545

Subproblem 2

x + -0.07142857145 = -2.564474724 Simplifying x + -0.07142857145 = -2.564474724 Reorder the terms: -0.07142857145 + x = -2.564474724 Solving -0.07142857145 + x = -2.564474724 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.07142857145' to each side of the equation. -0.07142857145 + 0.07142857145 + x = -2.564474724 + 0.07142857145 Combine like terms: -0.07142857145 + 0.07142857145 = 0.00000000000 0.00000000000 + x = -2.564474724 + 0.07142857145 x = -2.564474724 + 0.07142857145 Combine like terms: -2.564474724 + 0.07142857145 = -2.49304615255 x = -2.49304615255 Simplifying x = -2.49304615255

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.63590329545, -2.49304615255}

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