710x^2-390.5x+17.75=0

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Solution for 710x^2-390.5x+17.75=0 equation:


Simplifying
710x2 + -390.5x + 17.75 = 0

Reorder the terms:
17.75 + -390.5x + 710x2 = 0

Solving
17.75 + -390.5x + 710x2 = 0

Solving for variable 'x'.

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

Divide each side by '710'.
0.025 + -0.55x + x2 = 0

Move the constant term to the right:

Add '-0.025' to each side of the equation.
0.025 + -0.55x + -0.025 + x2 = 0 + -0.025

Reorder the terms:
0.025 + -0.025 + -0.55x + x2 = 0 + -0.025

Combine like terms: 0.025 + -0.025 = 0.000
0.000 + -0.55x + x2 = 0 + -0.025
-0.55x + x2 = 0 + -0.025

Combine like terms: 0 + -0.025 = -0.025
-0.55x + x2 = -0.025

The x term is -0.55x.  Take half its coefficient (-0.275).
Square it (0.075625) and add it to both sides.

Add '0.075625' to each side of the equation.
-0.55x + 0.075625 + x2 = -0.025 + 0.075625

Reorder the terms:
0.075625 + -0.55x + x2 = -0.025 + 0.075625

Combine like terms: -0.025 + 0.075625 = 0.050625
0.075625 + -0.55x + x2 = 0.050625

Factor a perfect square on the left side:
(x + -0.275)(x + -0.275) = 0.050625

Calculate the square root of the right side: 0.225

Break this problem into two subproblems by setting 
(x + -0.275) equal to 0.225 and -0.225.

Subproblem 1

x + -0.275 = 0.225 Simplifying x + -0.275 = 0.225 Reorder the terms: -0.275 + x = 0.225 Solving -0.275 + x = 0.225 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.275' to each side of the equation. -0.275 + 0.275 + x = 0.225 + 0.275 Combine like terms: -0.275 + 0.275 = 0.000 0.000 + x = 0.225 + 0.275 x = 0.225 + 0.275 Combine like terms: 0.225 + 0.275 = 0.5 x = 0.5 Simplifying x = 0.5

Subproblem 2

x + -0.275 = -0.225 Simplifying x + -0.275 = -0.225 Reorder the terms: -0.275 + x = -0.225 Solving -0.275 + x = -0.225 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.275' to each side of the equation. -0.275 + 0.275 + x = -0.225 + 0.275 Combine like terms: -0.275 + 0.275 = 0.000 0.000 + x = -0.225 + 0.275 x = -0.225 + 0.275 Combine like terms: -0.225 + 0.275 = 0.05 x = 0.05 Simplifying x = 0.05

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.5, 0.05}

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