7x^2=5x+10

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Solution for 7x^2=5x+10 equation:


Simplifying
7x2 = 5x + 10

Reorder the terms:
7x2 = 10 + 5x

Solving
7x2 = 10 + 5x

Solving for variable 'x'.

Reorder the terms:
-10 + -5x + 7x2 = 10 + 5x + -10 + -5x

Reorder the terms:
-10 + -5x + 7x2 = 10 + -10 + 5x + -5x

Combine like terms: 10 + -10 = 0
-10 + -5x + 7x2 = 0 + 5x + -5x
-10 + -5x + 7x2 = 5x + -5x

Combine like terms: 5x + -5x = 0
-10 + -5x + 7x2 = 0

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

Divide each side by '7'.
-1.428571429 + -0.7142857143x + x2 = 0

Move the constant term to the right:

Add '1.428571429' to each side of the equation.
-1.428571429 + -0.7142857143x + 1.428571429 + x2 = 0 + 1.428571429

Reorder the terms:
-1.428571429 + 1.428571429 + -0.7142857143x + x2 = 0 + 1.428571429

Combine like terms: -1.428571429 + 1.428571429 = 0.000000000
0.000000000 + -0.7142857143x + x2 = 0 + 1.428571429
-0.7142857143x + x2 = 0 + 1.428571429

Combine like terms: 0 + 1.428571429 = 1.428571429
-0.7142857143x + x2 = 1.428571429

The x term is -0.7142857143x.  Take half its coefficient (-0.3571428572).
Square it (0.1275510204) and add it to both sides.

Add '0.1275510204' to each side of the equation.
-0.7142857143x + 0.1275510204 + x2 = 1.428571429 + 0.1275510204

Reorder the terms:
0.1275510204 + -0.7142857143x + x2 = 1.428571429 + 0.1275510204

Combine like terms: 1.428571429 + 0.1275510204 = 1.5561224494
0.1275510204 + -0.7142857143x + x2 = 1.5561224494

Factor a perfect square on the left side:
(x + -0.3571428572)(x + -0.3571428572) = 1.5561224494

Calculate the square root of the right side: 1.247446371

Break this problem into two subproblems by setting 
(x + -0.3571428572) equal to 1.247446371 and -1.247446371.

Subproblem 1

x + -0.3571428572 = 1.247446371 Simplifying x + -0.3571428572 = 1.247446371 Reorder the terms: -0.3571428572 + x = 1.247446371 Solving -0.3571428572 + x = 1.247446371 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.3571428572' to each side of the equation. -0.3571428572 + 0.3571428572 + x = 1.247446371 + 0.3571428572 Combine like terms: -0.3571428572 + 0.3571428572 = 0.0000000000 0.0000000000 + x = 1.247446371 + 0.3571428572 x = 1.247446371 + 0.3571428572 Combine like terms: 1.247446371 + 0.3571428572 = 1.6045892282 x = 1.6045892282 Simplifying x = 1.6045892282

Subproblem 2

x + -0.3571428572 = -1.247446371 Simplifying x + -0.3571428572 = -1.247446371 Reorder the terms: -0.3571428572 + x = -1.247446371 Solving -0.3571428572 + x = -1.247446371 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.3571428572' to each side of the equation. -0.3571428572 + 0.3571428572 + x = -1.247446371 + 0.3571428572 Combine like terms: -0.3571428572 + 0.3571428572 = 0.0000000000 0.0000000000 + x = -1.247446371 + 0.3571428572 x = -1.247446371 + 0.3571428572 Combine like terms: -1.247446371 + 0.3571428572 = -0.8903035138 x = -0.8903035138 Simplifying x = -0.8903035138

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.6045892282, -0.8903035138}

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