.36(.36)+1.2x+x(x)=1

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Solution for .36(.36)+1.2x+x(x)=1 equation:


Simplifying
0.36(0.36) + 1.2x + x(x) = 1

Multiply 0.36 * 0.36
0.1296 + 1.2x + x(x) = 1

Multiply x * x
0.1296 + 1.2x + x2 = 1

Solving
0.1296 + 1.2x + x2 = 1

Solving for variable 'x'.

Reorder the terms:
0.1296 + -1 + 1.2x + x2 = 1 + -1

Combine like terms: 0.1296 + -1 = -0.8704
-0.8704 + 1.2x + x2 = 1 + -1

Combine like terms: 1 + -1 = 0
-0.8704 + 1.2x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '0.8704' to each side of the equation.
-0.8704 + 1.2x + 0.8704 + x2 = 0 + 0.8704

Reorder the terms:
-0.8704 + 0.8704 + 1.2x + x2 = 0 + 0.8704

Combine like terms: -0.8704 + 0.8704 = 0.0000
0.0000 + 1.2x + x2 = 0 + 0.8704
1.2x + x2 = 0 + 0.8704

Combine like terms: 0 + 0.8704 = 0.8704
1.2x + x2 = 0.8704

The x term is 1.2x.  Take half its coefficient (0.6).
Square it (0.36) and add it to both sides.

Add '0.36' to each side of the equation.
1.2x + 0.36 + x2 = 0.8704 + 0.36

Reorder the terms:
0.36 + 1.2x + x2 = 0.8704 + 0.36

Combine like terms: 0.8704 + 0.36 = 1.2304
0.36 + 1.2x + x2 = 1.2304

Factor a perfect square on the left side:
(x + 0.6)(x + 0.6) = 1.2304

Calculate the square root of the right side: 1.10923397

Break this problem into two subproblems by setting 
(x + 0.6) equal to 1.10923397 and -1.10923397.

Subproblem 1

x + 0.6 = 1.10923397 Simplifying x + 0.6 = 1.10923397 Reorder the terms: 0.6 + x = 1.10923397 Solving 0.6 + x = 1.10923397 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.6' to each side of the equation. 0.6 + -0.6 + x = 1.10923397 + -0.6 Combine like terms: 0.6 + -0.6 = 0.0 0.0 + x = 1.10923397 + -0.6 x = 1.10923397 + -0.6 Combine like terms: 1.10923397 + -0.6 = 0.50923397 x = 0.50923397 Simplifying x = 0.50923397

Subproblem 2

x + 0.6 = -1.10923397 Simplifying x + 0.6 = -1.10923397 Reorder the terms: 0.6 + x = -1.10923397 Solving 0.6 + x = -1.10923397 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.6' to each side of the equation. 0.6 + -0.6 + x = -1.10923397 + -0.6 Combine like terms: 0.6 + -0.6 = 0.0 0.0 + x = -1.10923397 + -0.6 x = -1.10923397 + -0.6 Combine like terms: -1.10923397 + -0.6 = -1.70923397 x = -1.70923397 Simplifying x = -1.70923397

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.50923397, -1.70923397}

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