7x(x-6)+6x=10

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Solution for 7x(x-6)+6x=10 equation:


Simplifying
7x(x + -6) + 6x = 10

Reorder the terms:
7x(-6 + x) + 6x = 10
(-6 * 7x + x * 7x) + 6x = 10
(-42x + 7x2) + 6x = 10

Reorder the terms:
-42x + 6x + 7x2 = 10

Combine like terms: -42x + 6x = -36x
-36x + 7x2 = 10

Solving
-36x + 7x2 = 10

Solving for variable 'x'.

Reorder the terms:
-10 + -36x + 7x2 = 10 + -10

Combine like terms: 10 + -10 = 0
-10 + -36x + 7x2 = 0

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

Divide each side by '7'.
-1.428571429 + -5.142857143x + x2 = 0

Move the constant term to the right:

Add '1.428571429' to each side of the equation.
-1.428571429 + -5.142857143x + 1.428571429 + x2 = 0 + 1.428571429

Reorder the terms:
-1.428571429 + 1.428571429 + -5.142857143x + x2 = 0 + 1.428571429

Combine like terms: -1.428571429 + 1.428571429 = 0.000000000
0.000000000 + -5.142857143x + x2 = 0 + 1.428571429
-5.142857143x + x2 = 0 + 1.428571429

Combine like terms: 0 + 1.428571429 = 1.428571429
-5.142857143x + x2 = 1.428571429

The x term is -5.142857143x.  Take half its coefficient (-2.571428572).
Square it (6.612244901) and add it to both sides.

Add '6.612244901' to each side of the equation.
-5.142857143x + 6.612244901 + x2 = 1.428571429 + 6.612244901

Reorder the terms:
6.612244901 + -5.142857143x + x2 = 1.428571429 + 6.612244901

Combine like terms: 1.428571429 + 6.612244901 = 8.04081633
6.612244901 + -5.142857143x + x2 = 8.04081633

Factor a perfect square on the left side:
(x + -2.571428572)(x + -2.571428572) = 8.04081633

Calculate the square root of the right side: 2.835633321

Break this problem into two subproblems by setting 
(x + -2.571428572) equal to 2.835633321 and -2.835633321.

Subproblem 1

x + -2.571428572 = 2.835633321 Simplifying x + -2.571428572 = 2.835633321 Reorder the terms: -2.571428572 + x = 2.835633321 Solving -2.571428572 + x = 2.835633321 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.571428572' to each side of the equation. -2.571428572 + 2.571428572 + x = 2.835633321 + 2.571428572 Combine like terms: -2.571428572 + 2.571428572 = 0.000000000 0.000000000 + x = 2.835633321 + 2.571428572 x = 2.835633321 + 2.571428572 Combine like terms: 2.835633321 + 2.571428572 = 5.407061893 x = 5.407061893 Simplifying x = 5.407061893

Subproblem 2

x + -2.571428572 = -2.835633321 Simplifying x + -2.571428572 = -2.835633321 Reorder the terms: -2.571428572 + x = -2.835633321 Solving -2.571428572 + x = -2.835633321 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.571428572' to each side of the equation. -2.571428572 + 2.571428572 + x = -2.835633321 + 2.571428572 Combine like terms: -2.571428572 + 2.571428572 = 0.000000000 0.000000000 + x = -2.835633321 + 2.571428572 x = -2.835633321 + 2.571428572 Combine like terms: -2.835633321 + 2.571428572 = -0.264204749 x = -0.264204749 Simplifying x = -0.264204749

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.407061893, -0.264204749}

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