0.16x^2-0.3x=1

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Solution for 0.16x^2-0.3x=1 equation:


Simplifying
0.16x2 + -0.3x = 1

Reorder the terms:
-0.3x + 0.16x2 = 1

Solving
-0.3x + 0.16x2 = 1

Solving for variable 'x'.

Reorder the terms:
-1 + -0.3x + 0.16x2 = 1 + -1

Combine like terms: 1 + -1 = 0
-1 + -0.3x + 0.16x2 = 0

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

Divide each side by '0.16'.
-6.25 + -1.875x + x2 = 0

Move the constant term to the right:

Add '6.25' to each side of the equation.
-6.25 + -1.875x + 6.25 + x2 = 0 + 6.25

Reorder the terms:
-6.25 + 6.25 + -1.875x + x2 = 0 + 6.25

Combine like terms: -6.25 + 6.25 = 0.00
0.00 + -1.875x + x2 = 0 + 6.25
-1.875x + x2 = 0 + 6.25

Combine like terms: 0 + 6.25 = 6.25
-1.875x + x2 = 6.25

The x term is -1.875x.  Take half its coefficient (-0.9375).
Square it (0.87890625) and add it to both sides.

Add '0.87890625' to each side of the equation.
-1.875x + 0.87890625 + x2 = 6.25 + 0.87890625

Reorder the terms:
0.87890625 + -1.875x + x2 = 6.25 + 0.87890625

Combine like terms: 6.25 + 0.87890625 = 7.12890625
0.87890625 + -1.875x + x2 = 7.12890625

Factor a perfect square on the left side:
(x + -0.9375)(x + -0.9375) = 7.12890625

Calculate the square root of the right side: 2.67000117

Break this problem into two subproblems by setting 
(x + -0.9375) equal to 2.67000117 and -2.67000117.

Subproblem 1

x + -0.9375 = 2.67000117 Simplifying x + -0.9375 = 2.67000117 Reorder the terms: -0.9375 + x = 2.67000117 Solving -0.9375 + x = 2.67000117 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.9375' to each side of the equation. -0.9375 + 0.9375 + x = 2.67000117 + 0.9375 Combine like terms: -0.9375 + 0.9375 = 0.0000 0.0000 + x = 2.67000117 + 0.9375 x = 2.67000117 + 0.9375 Combine like terms: 2.67000117 + 0.9375 = 3.60750117 x = 3.60750117 Simplifying x = 3.60750117

Subproblem 2

x + -0.9375 = -2.67000117 Simplifying x + -0.9375 = -2.67000117 Reorder the terms: -0.9375 + x = -2.67000117 Solving -0.9375 + x = -2.67000117 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.9375' to each side of the equation. -0.9375 + 0.9375 + x = -2.67000117 + 0.9375 Combine like terms: -0.9375 + 0.9375 = 0.0000 0.0000 + x = -2.67000117 + 0.9375 x = -2.67000117 + 0.9375 Combine like terms: -2.67000117 + 0.9375 = -1.73250117 x = -1.73250117 Simplifying x = -1.73250117

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.60750117, -1.73250117}

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