7x^2+6x-1224=0

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Solution for 7x^2+6x-1224=0 equation:


Simplifying
7x2 + 6x + -1224 = 0

Reorder the terms:
-1224 + 6x + 7x2 = 0

Solving
-1224 + 6x + 7x2 = 0

Solving for variable 'x'.

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

Divide each side by '7'.
-174.8571429 + 0.8571428571x + x2 = 0

Move the constant term to the right:

Add '174.8571429' to each side of the equation.
-174.8571429 + 0.8571428571x + 174.8571429 + x2 = 0 + 174.8571429

Reorder the terms:
-174.8571429 + 174.8571429 + 0.8571428571x + x2 = 0 + 174.8571429

Combine like terms: -174.8571429 + 174.8571429 = 0.0000000
0.0000000 + 0.8571428571x + x2 = 0 + 174.8571429
0.8571428571x + x2 = 0 + 174.8571429

Combine like terms: 0 + 174.8571429 = 174.8571429
0.8571428571x + x2 = 174.8571429

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 = 174.8571429 + 0.1836734694

Reorder the terms:
0.1836734694 + 0.8571428571x + x2 = 174.8571429 + 0.1836734694

Combine like terms: 174.8571429 + 0.1836734694 = 175.0408163694
0.1836734694 + 0.8571428571x + x2 = 175.0408163694

Factor a perfect square on the left side:
(x + 0.4285714286)(x + 0.4285714286) = 175.0408163694

Calculate the square root of the right side: 13.230299179

Break this problem into two subproblems by setting 
(x + 0.4285714286) equal to 13.230299179 and -13.230299179.

Subproblem 1

x + 0.4285714286 = 13.230299179 Simplifying x + 0.4285714286 = 13.230299179 Reorder the terms: 0.4285714286 + x = 13.230299179 Solving 0.4285714286 + x = 13.230299179 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 = 13.230299179 + -0.4285714286 Combine like terms: 0.4285714286 + -0.4285714286 = 0.0000000000 0.0000000000 + x = 13.230299179 + -0.4285714286 x = 13.230299179 + -0.4285714286 Combine like terms: 13.230299179 + -0.4285714286 = 12.8017277504 x = 12.8017277504 Simplifying x = 12.8017277504

Subproblem 2

x + 0.4285714286 = -13.230299179 Simplifying x + 0.4285714286 = -13.230299179 Reorder the terms: 0.4285714286 + x = -13.230299179 Solving 0.4285714286 + x = -13.230299179 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 = -13.230299179 + -0.4285714286 Combine like terms: 0.4285714286 + -0.4285714286 = 0.0000000000 0.0000000000 + x = -13.230299179 + -0.4285714286 x = -13.230299179 + -0.4285714286 Combine like terms: -13.230299179 + -0.4285714286 = -13.6588706076 x = -13.6588706076 Simplifying x = -13.6588706076

Solution

The solution to the problem is based on the solutions from the subproblems. x = {12.8017277504, -13.6588706076}

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