0=4x^2-47x-70

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Solution for 0=4x^2-47x-70 equation:


Simplifying
0 = 4x2 + -47x + -70

Reorder the terms:
0 = -70 + -47x + 4x2

Solving
0 = -70 + -47x + 4x2

Solving for variable 'x'.

Combine like terms: 0 + 70 = 70
70 + 47x + -4x2 = -70 + -47x + 4x2 + 70 + 47x + -4x2

Reorder the terms:
70 + 47x + -4x2 = -70 + 70 + -47x + 47x + 4x2 + -4x2

Combine like terms: -70 + 70 = 0
70 + 47x + -4x2 = 0 + -47x + 47x + 4x2 + -4x2
70 + 47x + -4x2 = -47x + 47x + 4x2 + -4x2

Combine like terms: -47x + 47x = 0
70 + 47x + -4x2 = 0 + 4x2 + -4x2
70 + 47x + -4x2 = 4x2 + -4x2

Combine like terms: 4x2 + -4x2 = 0
70 + 47x + -4x2 = 0

Begin completing the square.  Divide all terms by
-4 the coefficient of the squared term: 

Divide each side by '-4'.
-17.5 + -11.75x + x2 = 0

Move the constant term to the right:

Add '17.5' to each side of the equation.
-17.5 + -11.75x + 17.5 + x2 = 0 + 17.5

Reorder the terms:
-17.5 + 17.5 + -11.75x + x2 = 0 + 17.5

Combine like terms: -17.5 + 17.5 = 0.0
0.0 + -11.75x + x2 = 0 + 17.5
-11.75x + x2 = 0 + 17.5

Combine like terms: 0 + 17.5 = 17.5
-11.75x + x2 = 17.5

The x term is -11.75x.  Take half its coefficient (-5.875).
Square it (34.515625) and add it to both sides.

Add '34.515625' to each side of the equation.
-11.75x + 34.515625 + x2 = 17.5 + 34.515625

Reorder the terms:
34.515625 + -11.75x + x2 = 17.5 + 34.515625

Combine like terms: 17.5 + 34.515625 = 52.015625
34.515625 + -11.75x + x2 = 52.015625

Factor a perfect square on the left side:
(x + -5.875)(x + -5.875) = 52.015625

Calculate the square root of the right side: 7.212185868

Break this problem into two subproblems by setting 
(x + -5.875) equal to 7.212185868 and -7.212185868.

Subproblem 1

x + -5.875 = 7.212185868 Simplifying x + -5.875 = 7.212185868 Reorder the terms: -5.875 + x = 7.212185868 Solving -5.875 + x = 7.212185868 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5.875' to each side of the equation. -5.875 + 5.875 + x = 7.212185868 + 5.875 Combine like terms: -5.875 + 5.875 = 0.000 0.000 + x = 7.212185868 + 5.875 x = 7.212185868 + 5.875 Combine like terms: 7.212185868 + 5.875 = 13.087185868 x = 13.087185868 Simplifying x = 13.087185868

Subproblem 2

x + -5.875 = -7.212185868 Simplifying x + -5.875 = -7.212185868 Reorder the terms: -5.875 + x = -7.212185868 Solving -5.875 + x = -7.212185868 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5.875' to each side of the equation. -5.875 + 5.875 + x = -7.212185868 + 5.875 Combine like terms: -5.875 + 5.875 = 0.000 0.000 + x = -7.212185868 + 5.875 x = -7.212185868 + 5.875 Combine like terms: -7.212185868 + 5.875 = -1.337185868 x = -1.337185868 Simplifying x = -1.337185868

Solution

The solution to the problem is based on the solutions from the subproblems. x = {13.087185868, -1.337185868}

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