-7.5x-2=1-x^2

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Solution for -7.5x-2=1-x^2 equation:


Simplifying
-7.5x + -2 = 1 + -1x2

Reorder the terms:
-2 + -7.5x = 1 + -1x2

Solving
-2 + -7.5x = 1 + -1x2

Solving for variable 'x'.

Reorder the terms:
-2 + -1 + -7.5x + x2 = 1 + -1x2 + -1 + x2

Combine like terms: -2 + -1 = -3
-3 + -7.5x + x2 = 1 + -1x2 + -1 + x2

Reorder the terms:
-3 + -7.5x + x2 = 1 + -1 + -1x2 + x2

Combine like terms: 1 + -1 = 0
-3 + -7.5x + x2 = 0 + -1x2 + x2
-3 + -7.5x + x2 = -1x2 + x2

Combine like terms: -1x2 + x2 = 0
-3 + -7.5x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '3' to each side of the equation.
-3 + -7.5x + 3 + x2 = 0 + 3

Reorder the terms:
-3 + 3 + -7.5x + x2 = 0 + 3

Combine like terms: -3 + 3 = 0
0 + -7.5x + x2 = 0 + 3
-7.5x + x2 = 0 + 3

Combine like terms: 0 + 3 = 3
-7.5x + x2 = 3

The x term is -7.5x.  Take half its coefficient (-3.75).
Square it (14.0625) and add it to both sides.

Add '14.0625' to each side of the equation.
-7.5x + 14.0625 + x2 = 3 + 14.0625

Reorder the terms:
14.0625 + -7.5x + x2 = 3 + 14.0625

Combine like terms: 3 + 14.0625 = 17.0625
14.0625 + -7.5x + x2 = 17.0625

Factor a perfect square on the left side:
(x + -3.75)(x + -3.75) = 17.0625

Calculate the square root of the right side: 4.13067791

Break this problem into two subproblems by setting 
(x + -3.75) equal to 4.13067791 and -4.13067791.

Subproblem 1

x + -3.75 = 4.13067791 Simplifying x + -3.75 = 4.13067791 Reorder the terms: -3.75 + x = 4.13067791 Solving -3.75 + x = 4.13067791 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.75' to each side of the equation. -3.75 + 3.75 + x = 4.13067791 + 3.75 Combine like terms: -3.75 + 3.75 = 0.00 0.00 + x = 4.13067791 + 3.75 x = 4.13067791 + 3.75 Combine like terms: 4.13067791 + 3.75 = 7.88067791 x = 7.88067791 Simplifying x = 7.88067791

Subproblem 2

x + -3.75 = -4.13067791 Simplifying x + -3.75 = -4.13067791 Reorder the terms: -3.75 + x = -4.13067791 Solving -3.75 + x = -4.13067791 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.75' to each side of the equation. -3.75 + 3.75 + x = -4.13067791 + 3.75 Combine like terms: -3.75 + 3.75 = 0.00 0.00 + x = -4.13067791 + 3.75 x = -4.13067791 + 3.75 Combine like terms: -4.13067791 + 3.75 = -0.38067791 x = -0.38067791 Simplifying x = -0.38067791

Solution

The solution to the problem is based on the solutions from the subproblems. x = {7.88067791, -0.38067791}

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