-5x^2+14x-4=0

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Solution for -5x^2+14x-4=0 equation:


Simplifying
-5x2 + 14x + -4 = 0

Reorder the terms:
-4 + 14x + -5x2 = 0

Solving
-4 + 14x + -5x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-5 the coefficient of the squared term: 

Divide each side by '-5'.
0.8 + -2.8x + x2 = 0

Move the constant term to the right:

Add '-0.8' to each side of the equation.
0.8 + -2.8x + -0.8 + x2 = 0 + -0.8

Reorder the terms:
0.8 + -0.8 + -2.8x + x2 = 0 + -0.8

Combine like terms: 0.8 + -0.8 = 0.0
0.0 + -2.8x + x2 = 0 + -0.8
-2.8x + x2 = 0 + -0.8

Combine like terms: 0 + -0.8 = -0.8
-2.8x + x2 = -0.8

The x term is -2.8x.  Take half its coefficient (-1.4).
Square it (1.96) and add it to both sides.

Add '1.96' to each side of the equation.
-2.8x + 1.96 + x2 = -0.8 + 1.96

Reorder the terms:
1.96 + -2.8x + x2 = -0.8 + 1.96

Combine like terms: -0.8 + 1.96 = 1.16
1.96 + -2.8x + x2 = 1.16

Factor a perfect square on the left side:
(x + -1.4)(x + -1.4) = 1.16

Calculate the square root of the right side: 1.077032961

Break this problem into two subproblems by setting 
(x + -1.4) equal to 1.077032961 and -1.077032961.

Subproblem 1

x + -1.4 = 1.077032961 Simplifying x + -1.4 = 1.077032961 Reorder the terms: -1.4 + x = 1.077032961 Solving -1.4 + x = 1.077032961 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.4' to each side of the equation. -1.4 + 1.4 + x = 1.077032961 + 1.4 Combine like terms: -1.4 + 1.4 = 0.0 0.0 + x = 1.077032961 + 1.4 x = 1.077032961 + 1.4 Combine like terms: 1.077032961 + 1.4 = 2.477032961 x = 2.477032961 Simplifying x = 2.477032961

Subproblem 2

x + -1.4 = -1.077032961 Simplifying x + -1.4 = -1.077032961 Reorder the terms: -1.4 + x = -1.077032961 Solving -1.4 + x = -1.077032961 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.4' to each side of the equation. -1.4 + 1.4 + x = -1.077032961 + 1.4 Combine like terms: -1.4 + 1.4 = 0.0 0.0 + x = -1.077032961 + 1.4 x = -1.077032961 + 1.4 Combine like terms: -1.077032961 + 1.4 = 0.322967039 x = 0.322967039 Simplifying x = 0.322967039

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.477032961, 0.322967039}

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