7x^2+4x-10=6

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Solution for 7x^2+4x-10=6 equation:


Simplifying
7x2 + 4x + -10 = 6

Reorder the terms:
-10 + 4x + 7x2 = 6

Solving
-10 + 4x + 7x2 = 6

Solving for variable 'x'.

Reorder the terms:
-10 + -6 + 4x + 7x2 = 6 + -6

Combine like terms: -10 + -6 = -16
-16 + 4x + 7x2 = 6 + -6

Combine like terms: 6 + -6 = 0
-16 + 4x + 7x2 = 0

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

Divide each side by '7'.
-2.285714286 + 0.5714285714x + x2 = 0

Move the constant term to the right:

Add '2.285714286' to each side of the equation.
-2.285714286 + 0.5714285714x + 2.285714286 + x2 = 0 + 2.285714286

Reorder the terms:
-2.285714286 + 2.285714286 + 0.5714285714x + x2 = 0 + 2.285714286

Combine like terms: -2.285714286 + 2.285714286 = 0.000000000
0.000000000 + 0.5714285714x + x2 = 0 + 2.285714286
0.5714285714x + x2 = 0 + 2.285714286

Combine like terms: 0 + 2.285714286 = 2.285714286
0.5714285714x + x2 = 2.285714286

The x term is 0.5714285714x.  Take half its coefficient (0.2857142857).
Square it (0.08163265305) and add it to both sides.

Add '0.08163265305' to each side of the equation.
0.5714285714x + 0.08163265305 + x2 = 2.285714286 + 0.08163265305

Reorder the terms:
0.08163265305 + 0.5714285714x + x2 = 2.285714286 + 0.08163265305

Combine like terms: 2.285714286 + 0.08163265305 = 2.36734693905
0.08163265305 + 0.5714285714x + x2 = 2.36734693905

Factor a perfect square on the left side:
(x + 0.2857142857)(x + 0.2857142857) = 2.36734693905

Calculate the square root of the right side: 1.538618516

Break this problem into two subproblems by setting 
(x + 0.2857142857) equal to 1.538618516 and -1.538618516.

Subproblem 1

x + 0.2857142857 = 1.538618516 Simplifying x + 0.2857142857 = 1.538618516 Reorder the terms: 0.2857142857 + x = 1.538618516 Solving 0.2857142857 + x = 1.538618516 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.2857142857' to each side of the equation. 0.2857142857 + -0.2857142857 + x = 1.538618516 + -0.2857142857 Combine like terms: 0.2857142857 + -0.2857142857 = 0.0000000000 0.0000000000 + x = 1.538618516 + -0.2857142857 x = 1.538618516 + -0.2857142857 Combine like terms: 1.538618516 + -0.2857142857 = 1.2529042303 x = 1.2529042303 Simplifying x = 1.2529042303

Subproblem 2

x + 0.2857142857 = -1.538618516 Simplifying x + 0.2857142857 = -1.538618516 Reorder the terms: 0.2857142857 + x = -1.538618516 Solving 0.2857142857 + x = -1.538618516 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.2857142857' to each side of the equation. 0.2857142857 + -0.2857142857 + x = -1.538618516 + -0.2857142857 Combine like terms: 0.2857142857 + -0.2857142857 = 0.0000000000 0.0000000000 + x = -1.538618516 + -0.2857142857 x = -1.538618516 + -0.2857142857 Combine like terms: -1.538618516 + -0.2857142857 = -1.8243328017 x = -1.8243328017 Simplifying x = -1.8243328017

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.2529042303, -1.8243328017}

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