7x^2+43x-760=0

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Solution for 7x^2+43x-760=0 equation:


Simplifying
7x2 + 43x + -760 = 0

Reorder the terms:
-760 + 43x + 7x2 = 0

Solving
-760 + 43x + 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'.
-108.5714286 + 6.142857143x + x2 = 0

Move the constant term to the right:

Add '108.5714286' to each side of the equation.
-108.5714286 + 6.142857143x + 108.5714286 + x2 = 0 + 108.5714286

Reorder the terms:
-108.5714286 + 108.5714286 + 6.142857143x + x2 = 0 + 108.5714286

Combine like terms: -108.5714286 + 108.5714286 = 0.0000000
0.0000000 + 6.142857143x + x2 = 0 + 108.5714286
6.142857143x + x2 = 0 + 108.5714286

Combine like terms: 0 + 108.5714286 = 108.5714286
6.142857143x + x2 = 108.5714286

The x term is 6.142857143x.  Take half its coefficient (3.071428572).
Square it (9.433673473) and add it to both sides.

Add '9.433673473' to each side of the equation.
6.142857143x + 9.433673473 + x2 = 108.5714286 + 9.433673473

Reorder the terms:
9.433673473 + 6.142857143x + x2 = 108.5714286 + 9.433673473

Combine like terms: 108.5714286 + 9.433673473 = 118.005102073
9.433673473 + 6.142857143x + x2 = 118.005102073

Factor a perfect square on the left side:
(x + 3.071428572)(x + 3.071428572) = 118.005102073

Calculate the square root of the right side: 10.863015331

Break this problem into two subproblems by setting 
(x + 3.071428572) equal to 10.863015331 and -10.863015331.

Subproblem 1

x + 3.071428572 = 10.863015331 Simplifying x + 3.071428572 = 10.863015331 Reorder the terms: 3.071428572 + x = 10.863015331 Solving 3.071428572 + x = 10.863015331 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.071428572' to each side of the equation. 3.071428572 + -3.071428572 + x = 10.863015331 + -3.071428572 Combine like terms: 3.071428572 + -3.071428572 = 0.000000000 0.000000000 + x = 10.863015331 + -3.071428572 x = 10.863015331 + -3.071428572 Combine like terms: 10.863015331 + -3.071428572 = 7.791586759 x = 7.791586759 Simplifying x = 7.791586759

Subproblem 2

x + 3.071428572 = -10.863015331 Simplifying x + 3.071428572 = -10.863015331 Reorder the terms: 3.071428572 + x = -10.863015331 Solving 3.071428572 + x = -10.863015331 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.071428572' to each side of the equation. 3.071428572 + -3.071428572 + x = -10.863015331 + -3.071428572 Combine like terms: 3.071428572 + -3.071428572 = 0.000000000 0.000000000 + x = -10.863015331 + -3.071428572 x = -10.863015331 + -3.071428572 Combine like terms: -10.863015331 + -3.071428572 = -13.934443903 x = -13.934443903 Simplifying x = -13.934443903

Solution

The solution to the problem is based on the solutions from the subproblems. x = {7.791586759, -13.934443903}

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