-0.04x^2+8.3x+4.3=

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Solution for -0.04x^2+8.3x+4.3= equation:


Simplifying
-0.04x2 + 8.3x + 4.3 = 0

Reorder the terms:
4.3 + 8.3x + -0.04x2 = 0

Solving
4.3 + 8.3x + -0.04x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-0.04 the coefficient of the squared term: 

Divide each side by '-0.04'.
-107.5 + -207.5x + x2 = 0

Move the constant term to the right:

Add '107.5' to each side of the equation.
-107.5 + -207.5x + 107.5 + x2 = 0 + 107.5

Reorder the terms:
-107.5 + 107.5 + -207.5x + x2 = 0 + 107.5

Combine like terms: -107.5 + 107.5 = 0.0
0.0 + -207.5x + x2 = 0 + 107.5
-207.5x + x2 = 0 + 107.5

Combine like terms: 0 + 107.5 = 107.5
-207.5x + x2 = 107.5

The x term is -207.5x.  Take half its coefficient (-103.75).
Square it (10764.0625) and add it to both sides.

Add '10764.0625' to each side of the equation.
-207.5x + 10764.0625 + x2 = 107.5 + 10764.0625

Reorder the terms:
10764.0625 + -207.5x + x2 = 107.5 + 10764.0625

Combine like terms: 107.5 + 10764.0625 = 10871.5625
10764.0625 + -207.5x + x2 = 10871.5625

Factor a perfect square on the left side:
(x + -103.75)(x + -103.75) = 10871.5625

Calculate the square root of the right side: 104.266785219

Break this problem into two subproblems by setting 
(x + -103.75) equal to 104.266785219 and -104.266785219.

Subproblem 1

x + -103.75 = 104.266785219 Simplifying x + -103.75 = 104.266785219 Reorder the terms: -103.75 + x = 104.266785219 Solving -103.75 + x = 104.266785219 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '103.75' to each side of the equation. -103.75 + 103.75 + x = 104.266785219 + 103.75 Combine like terms: -103.75 + 103.75 = 0.00 0.00 + x = 104.266785219 + 103.75 x = 104.266785219 + 103.75 Combine like terms: 104.266785219 + 103.75 = 208.016785219 x = 208.016785219 Simplifying x = 208.016785219

Subproblem 2

x + -103.75 = -104.266785219 Simplifying x + -103.75 = -104.266785219 Reorder the terms: -103.75 + x = -104.266785219 Solving -103.75 + x = -104.266785219 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '103.75' to each side of the equation. -103.75 + 103.75 + x = -104.266785219 + 103.75 Combine like terms: -103.75 + 103.75 = 0.00 0.00 + x = -104.266785219 + 103.75 x = -104.266785219 + 103.75 Combine like terms: -104.266785219 + 103.75 = -0.516785219 x = -0.516785219 Simplifying x = -0.516785219

Solution

The solution to the problem is based on the solutions from the subproblems. x = {208.016785219, -0.516785219}

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