10x^2-8x-3=0

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Solution for 10x^2-8x-3=0 equation:


Simplifying
10x2 + -8x + -3 = 0

Reorder the terms:
-3 + -8x + 10x2 = 0

Solving
-3 + -8x + 10x2 = 0

Solving for variable 'x'.

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

Divide each side by '10'.
-0.3 + -0.8x + x2 = 0

Move the constant term to the right:

Add '0.3' to each side of the equation.
-0.3 + -0.8x + 0.3 + x2 = 0 + 0.3

Reorder the terms:
-0.3 + 0.3 + -0.8x + x2 = 0 + 0.3

Combine like terms: -0.3 + 0.3 = 0.0
0.0 + -0.8x + x2 = 0 + 0.3
-0.8x + x2 = 0 + 0.3

Combine like terms: 0 + 0.3 = 0.3
-0.8x + x2 = 0.3

The x term is -0.8x.  Take half its coefficient (-0.4).
Square it (0.16) and add it to both sides.

Add '0.16' to each side of the equation.
-0.8x + 0.16 + x2 = 0.3 + 0.16

Reorder the terms:
0.16 + -0.8x + x2 = 0.3 + 0.16

Combine like terms: 0.3 + 0.16 = 0.46
0.16 + -0.8x + x2 = 0.46

Factor a perfect square on the left side:
(x + -0.4)(x + -0.4) = 0.46

Calculate the square root of the right side: 0.678232998

Break this problem into two subproblems by setting 
(x + -0.4) equal to 0.678232998 and -0.678232998.

Subproblem 1

x + -0.4 = 0.678232998 Simplifying x + -0.4 = 0.678232998 Reorder the terms: -0.4 + x = 0.678232998 Solving -0.4 + x = 0.678232998 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.4' to each side of the equation. -0.4 + 0.4 + x = 0.678232998 + 0.4 Combine like terms: -0.4 + 0.4 = 0.0 0.0 + x = 0.678232998 + 0.4 x = 0.678232998 + 0.4 Combine like terms: 0.678232998 + 0.4 = 1.078232998 x = 1.078232998 Simplifying x = 1.078232998

Subproblem 2

x + -0.4 = -0.678232998 Simplifying x + -0.4 = -0.678232998 Reorder the terms: -0.4 + x = -0.678232998 Solving -0.4 + x = -0.678232998 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.4' to each side of the equation. -0.4 + 0.4 + x = -0.678232998 + 0.4 Combine like terms: -0.4 + 0.4 = 0.0 0.0 + x = -0.678232998 + 0.4 x = -0.678232998 + 0.4 Combine like terms: -0.678232998 + 0.4 = -0.278232998 x = -0.278232998 Simplifying x = -0.278232998

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.078232998, -0.278232998}

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