7x^2-2=6x+2

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Solution for 7x^2-2=6x+2 equation:


Simplifying
7x2 + -2 = 6x + 2

Reorder the terms:
-2 + 7x2 = 6x + 2

Reorder the terms:
-2 + 7x2 = 2 + 6x

Solving
-2 + 7x2 = 2 + 6x

Solving for variable 'x'.

Reorder the terms:
-2 + -2 + -6x + 7x2 = 2 + 6x + -2 + -6x

Combine like terms: -2 + -2 = -4
-4 + -6x + 7x2 = 2 + 6x + -2 + -6x

Reorder the terms:
-4 + -6x + 7x2 = 2 + -2 + 6x + -6x

Combine like terms: 2 + -2 = 0
-4 + -6x + 7x2 = 0 + 6x + -6x
-4 + -6x + 7x2 = 6x + -6x

Combine like terms: 6x + -6x = 0
-4 + -6x + 7x2 = 0

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

Divide each side by '7'.
-0.5714285714 + -0.8571428571x + x2 = 0

Move the constant term to the right:

Add '0.5714285714' to each side of the equation.
-0.5714285714 + -0.8571428571x + 0.5714285714 + x2 = 0 + 0.5714285714

Reorder the terms:
-0.5714285714 + 0.5714285714 + -0.8571428571x + x2 = 0 + 0.5714285714

Combine like terms: -0.5714285714 + 0.5714285714 = 0.0000000000
0.0000000000 + -0.8571428571x + x2 = 0 + 0.5714285714
-0.8571428571x + x2 = 0 + 0.5714285714

Combine like terms: 0 + 0.5714285714 = 0.5714285714
-0.8571428571x + x2 = 0.5714285714

The x term is -0.8571428571x.  Take half its coefficient (-0.4285714286).
Square it (0.1836734694) and add it to both sides.

Add '0.1836734694' to each side of the equation.
-0.8571428571x + 0.1836734694 + x2 = 0.5714285714 + 0.1836734694

Reorder the terms:
0.1836734694 + -0.8571428571x + x2 = 0.5714285714 + 0.1836734694

Combine like terms: 0.5714285714 + 0.1836734694 = 0.7551020408
0.1836734694 + -0.8571428571x + x2 = 0.7551020408

Factor a perfect square on the left side:
(x + -0.4285714286)(x + -0.4285714286) = 0.7551020408

Calculate the square root of the right side: 0.868966076

Break this problem into two subproblems by setting 
(x + -0.4285714286) equal to 0.868966076 and -0.868966076.

Subproblem 1

x + -0.4285714286 = 0.868966076 Simplifying x + -0.4285714286 = 0.868966076 Reorder the terms: -0.4285714286 + x = 0.868966076 Solving -0.4285714286 + x = 0.868966076 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.4285714286' to each side of the equation. -0.4285714286 + 0.4285714286 + x = 0.868966076 + 0.4285714286 Combine like terms: -0.4285714286 + 0.4285714286 = 0.0000000000 0.0000000000 + x = 0.868966076 + 0.4285714286 x = 0.868966076 + 0.4285714286 Combine like terms: 0.868966076 + 0.4285714286 = 1.2975375046 x = 1.2975375046 Simplifying x = 1.2975375046

Subproblem 2

x + -0.4285714286 = -0.868966076 Simplifying x + -0.4285714286 = -0.868966076 Reorder the terms: -0.4285714286 + x = -0.868966076 Solving -0.4285714286 + x = -0.868966076 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.4285714286' to each side of the equation. -0.4285714286 + 0.4285714286 + x = -0.868966076 + 0.4285714286 Combine like terms: -0.4285714286 + 0.4285714286 = 0.0000000000 0.0000000000 + x = -0.868966076 + 0.4285714286 x = -0.868966076 + 0.4285714286 Combine like terms: -0.868966076 + 0.4285714286 = -0.4403946474 x = -0.4403946474 Simplifying x = -0.4403946474

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.2975375046, -0.4403946474}

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