9x(7x-1)=2

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Solution for 9x(7x-1)=2 equation:


Simplifying
9x(7x + -1) = 2

Reorder the terms:
9x(-1 + 7x) = 2
(-1 * 9x + 7x * 9x) = 2
(-9x + 63x2) = 2

Solving
-9x + 63x2 = 2

Solving for variable 'x'.

Reorder the terms:
-2 + -9x + 63x2 = 2 + -2

Combine like terms: 2 + -2 = 0
-2 + -9x + 63x2 = 0

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

Divide each side by '63'.
-0.03174603175 + -0.1428571429x + x2 = 0

Move the constant term to the right:

Add '0.03174603175' to each side of the equation.
-0.03174603175 + -0.1428571429x + 0.03174603175 + x2 = 0 + 0.03174603175

Reorder the terms:
-0.03174603175 + 0.03174603175 + -0.1428571429x + x2 = 0 + 0.03174603175

Combine like terms: -0.03174603175 + 0.03174603175 = 0.00000000000
0.00000000000 + -0.1428571429x + x2 = 0 + 0.03174603175
-0.1428571429x + x2 = 0 + 0.03174603175

Combine like terms: 0 + 0.03174603175 = 0.03174603175
-0.1428571429x + x2 = 0.03174603175

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 = 0.03174603175 + 0.005102040819

Reorder the terms:
0.005102040819 + -0.1428571429x + x2 = 0.03174603175 + 0.005102040819

Combine like terms: 0.03174603175 + 0.005102040819 = 0.036848072569
0.005102040819 + -0.1428571429x + x2 = 0.036848072569

Factor a perfect square on the left side:
(x + -0.07142857145)(x + -0.07142857145) = 0.036848072569

Calculate the square root of the right side: 0.191958518

Break this problem into two subproblems by setting 
(x + -0.07142857145) equal to 0.191958518 and -0.191958518.

Subproblem 1

x + -0.07142857145 = 0.191958518 Simplifying x + -0.07142857145 = 0.191958518 Reorder the terms: -0.07142857145 + x = 0.191958518 Solving -0.07142857145 + x = 0.191958518 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 = 0.191958518 + 0.07142857145 Combine like terms: -0.07142857145 + 0.07142857145 = 0.00000000000 0.00000000000 + x = 0.191958518 + 0.07142857145 x = 0.191958518 + 0.07142857145 Combine like terms: 0.191958518 + 0.07142857145 = 0.26338708945 x = 0.26338708945 Simplifying x = 0.26338708945

Subproblem 2

x + -0.07142857145 = -0.191958518 Simplifying x + -0.07142857145 = -0.191958518 Reorder the terms: -0.07142857145 + x = -0.191958518 Solving -0.07142857145 + x = -0.191958518 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 = -0.191958518 + 0.07142857145 Combine like terms: -0.07142857145 + 0.07142857145 = 0.00000000000 0.00000000000 + x = -0.191958518 + 0.07142857145 x = -0.191958518 + 0.07142857145 Combine like terms: -0.191958518 + 0.07142857145 = -0.12052994655 x = -0.12052994655 Simplifying x = -0.12052994655

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.26338708945, -0.12052994655}

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