-3.2x=1.44-x^2

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Solution for -3.2x=1.44-x^2 equation:


Simplifying
-3.2x = 1.44 + -1x2

Solving
-3.2x = 1.44 + -1x2

Solving for variable 'x'.

Reorder the terms:
-1.44 + -3.2x + x2 = 1.44 + -1x2 + -1.44 + x2

Reorder the terms:
-1.44 + -3.2x + x2 = 1.44 + -1.44 + -1x2 + x2

Combine like terms: 1.44 + -1.44 = 0.00
-1.44 + -3.2x + x2 = 0.00 + -1x2 + x2
-1.44 + -3.2x + x2 = -1x2 + x2

Combine like terms: -1x2 + x2 = 0
-1.44 + -3.2x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '1.44' to each side of the equation.
-1.44 + -3.2x + 1.44 + x2 = 0 + 1.44

Reorder the terms:
-1.44 + 1.44 + -3.2x + x2 = 0 + 1.44

Combine like terms: -1.44 + 1.44 = 0.00
0.00 + -3.2x + x2 = 0 + 1.44
-3.2x + x2 = 0 + 1.44

Combine like terms: 0 + 1.44 = 1.44
-3.2x + x2 = 1.44

The x term is -3.2x.  Take half its coefficient (-1.6).
Square it (2.56) and add it to both sides.

Add '2.56' to each side of the equation.
-3.2x + 2.56 + x2 = 1.44 + 2.56

Reorder the terms:
2.56 + -3.2x + x2 = 1.44 + 2.56

Combine like terms: 1.44 + 2.56 = 4
2.56 + -3.2x + x2 = 4

Factor a perfect square on the left side:
(x + -1.6)(x + -1.6) = 4

Calculate the square root of the right side: 2

Break this problem into two subproblems by setting 
(x + -1.6) equal to 2 and -2.

Subproblem 1

x + -1.6 = 2 Simplifying x + -1.6 = 2 Reorder the terms: -1.6 + x = 2 Solving -1.6 + x = 2 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.6' to each side of the equation. -1.6 + 1.6 + x = 2 + 1.6 Combine like terms: -1.6 + 1.6 = 0.0 0.0 + x = 2 + 1.6 x = 2 + 1.6 Combine like terms: 2 + 1.6 = 3.6 x = 3.6 Simplifying x = 3.6

Subproblem 2

x + -1.6 = -2 Simplifying x + -1.6 = -2 Reorder the terms: -1.6 + x = -2 Solving -1.6 + x = -2 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.6' to each side of the equation. -1.6 + 1.6 + x = -2 + 1.6 Combine like terms: -1.6 + 1.6 = 0.0 0.0 + x = -2 + 1.6 x = -2 + 1.6 Combine like terms: -2 + 1.6 = -0.4 x = -0.4 Simplifying x = -0.4

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.6, -0.4}

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