x=4x^2+42x-50

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Solution for x=4x^2+42x-50 equation:


Simplifying
x = 4x2 + 42x + -50

Reorder the terms:
x = -50 + 42x + 4x2

Solving
x = -50 + 42x + 4x2

Solving for variable 'x'.

Reorder the terms:
50 + x + -42x + -4x2 = -50 + 42x + 4x2 + 50 + -42x + -4x2

Combine like terms: x + -42x = -41x
50 + -41x + -4x2 = -50 + 42x + 4x2 + 50 + -42x + -4x2

Reorder the terms:
50 + -41x + -4x2 = -50 + 50 + 42x + -42x + 4x2 + -4x2

Combine like terms: -50 + 50 = 0
50 + -41x + -4x2 = 0 + 42x + -42x + 4x2 + -4x2
50 + -41x + -4x2 = 42x + -42x + 4x2 + -4x2

Combine like terms: 42x + -42x = 0
50 + -41x + -4x2 = 0 + 4x2 + -4x2
50 + -41x + -4x2 = 4x2 + -4x2

Combine like terms: 4x2 + -4x2 = 0
50 + -41x + -4x2 = 0

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

Divide each side by '-4'.
-12.5 + 10.25x + x2 = 0

Move the constant term to the right:

Add '12.5' to each side of the equation.
-12.5 + 10.25x + 12.5 + x2 = 0 + 12.5

Reorder the terms:
-12.5 + 12.5 + 10.25x + x2 = 0 + 12.5

Combine like terms: -12.5 + 12.5 = 0.0
0.0 + 10.25x + x2 = 0 + 12.5
10.25x + x2 = 0 + 12.5

Combine like terms: 0 + 12.5 = 12.5
10.25x + x2 = 12.5

The x term is 10.25x.  Take half its coefficient (5.125).
Square it (26.265625) and add it to both sides.

Add '26.265625' to each side of the equation.
10.25x + 26.265625 + x2 = 12.5 + 26.265625

Reorder the terms:
26.265625 + 10.25x + x2 = 12.5 + 26.265625

Combine like terms: 12.5 + 26.265625 = 38.765625
26.265625 + 10.25x + x2 = 38.765625

Factor a perfect square on the left side:
(x + 5.125)(x + 5.125) = 38.765625

Calculate the square root of the right side: 6.226204703

Break this problem into two subproblems by setting 
(x + 5.125) equal to 6.226204703 and -6.226204703.

Subproblem 1

x + 5.125 = 6.226204703 Simplifying x + 5.125 = 6.226204703 Reorder the terms: 5.125 + x = 6.226204703 Solving 5.125 + x = 6.226204703 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5.125' to each side of the equation. 5.125 + -5.125 + x = 6.226204703 + -5.125 Combine like terms: 5.125 + -5.125 = 0.000 0.000 + x = 6.226204703 + -5.125 x = 6.226204703 + -5.125 Combine like terms: 6.226204703 + -5.125 = 1.101204703 x = 1.101204703 Simplifying x = 1.101204703

Subproblem 2

x + 5.125 = -6.226204703 Simplifying x + 5.125 = -6.226204703 Reorder the terms: 5.125 + x = -6.226204703 Solving 5.125 + x = -6.226204703 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5.125' to each side of the equation. 5.125 + -5.125 + x = -6.226204703 + -5.125 Combine like terms: 5.125 + -5.125 = 0.000 0.000 + x = -6.226204703 + -5.125 x = -6.226204703 + -5.125 Combine like terms: -6.226204703 + -5.125 = -11.351204703 x = -11.351204703 Simplifying x = -11.351204703

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.101204703, -11.351204703}

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