0=0.2x^2-1.7x+1.4

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Solution for 0=0.2x^2-1.7x+1.4 equation:


Simplifying
0 = 0.2x2 + -1.7x + 1.4

Reorder the terms:
0 = 1.4 + -1.7x + 0.2x2

Solving
0 = 1.4 + -1.7x + 0.2x2

Solving for variable 'x'.

Combine like terms: 0 + -1.4 = -1.4
-1.4 + 1.7x + -0.2x2 = 1.4 + -1.7x + 0.2x2 + -1.4 + 1.7x + -0.2x2

Reorder the terms:
-1.4 + 1.7x + -0.2x2 = 1.4 + -1.4 + -1.7x + 1.7x + 0.2x2 + -0.2x2

Combine like terms: 1.4 + -1.4 = 0.0
-1.4 + 1.7x + -0.2x2 = 0.0 + -1.7x + 1.7x + 0.2x2 + -0.2x2
-1.4 + 1.7x + -0.2x2 = -1.7x + 1.7x + 0.2x2 + -0.2x2

Combine like terms: -1.7x + 1.7x = 0.0
-1.4 + 1.7x + -0.2x2 = 0.0 + 0.2x2 + -0.2x2
-1.4 + 1.7x + -0.2x2 = 0.2x2 + -0.2x2

Combine like terms: 0.2x2 + -0.2x2 = 0.0
-1.4 + 1.7x + -0.2x2 = 0.0

Begin completing the square.  Divide all terms by
-0.2 the coefficient of the squared term: 

Divide each side by '-0.2'.
7 + -8.5x + x2 = 0

Move the constant term to the right:

Add '-7' to each side of the equation.
7 + -8.5x + -7 + x2 = 0 + -7

Reorder the terms:
7 + -7 + -8.5x + x2 = 0 + -7

Combine like terms: 7 + -7 = 0
0 + -8.5x + x2 = 0 + -7
-8.5x + x2 = 0 + -7

Combine like terms: 0 + -7 = -7
-8.5x + x2 = -7

The x term is -8.5x.  Take half its coefficient (-4.25).
Square it (18.0625) and add it to both sides.

Add '18.0625' to each side of the equation.
-8.5x + 18.0625 + x2 = -7 + 18.0625

Reorder the terms:
18.0625 + -8.5x + x2 = -7 + 18.0625

Combine like terms: -7 + 18.0625 = 11.0625
18.0625 + -8.5x + x2 = 11.0625

Factor a perfect square on the left side:
(x + -4.25)(x + -4.25) = 11.0625

Calculate the square root of the right side: 3.326033674

Break this problem into two subproblems by setting 
(x + -4.25) equal to 3.326033674 and -3.326033674.

Subproblem 1

x + -4.25 = 3.326033674 Simplifying x + -4.25 = 3.326033674 Reorder the terms: -4.25 + x = 3.326033674 Solving -4.25 + x = 3.326033674 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.25' to each side of the equation. -4.25 + 4.25 + x = 3.326033674 + 4.25 Combine like terms: -4.25 + 4.25 = 0.00 0.00 + x = 3.326033674 + 4.25 x = 3.326033674 + 4.25 Combine like terms: 3.326033674 + 4.25 = 7.576033674 x = 7.576033674 Simplifying x = 7.576033674

Subproblem 2

x + -4.25 = -3.326033674 Simplifying x + -4.25 = -3.326033674 Reorder the terms: -4.25 + x = -3.326033674 Solving -4.25 + x = -3.326033674 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.25' to each side of the equation. -4.25 + 4.25 + x = -3.326033674 + 4.25 Combine like terms: -4.25 + 4.25 = 0.00 0.00 + x = -3.326033674 + 4.25 x = -3.326033674 + 4.25 Combine like terms: -3.326033674 + 4.25 = 0.923966326 x = 0.923966326 Simplifying x = 0.923966326

Solution

The solution to the problem is based on the solutions from the subproblems. x = {7.576033674, 0.923966326}

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