-.75x^2+1.5x+62.25=0

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Solution for -.75x^2+1.5x+62.25=0 equation:


Simplifying
-0.75x2 + 1.5x + 62.25 = 0

Reorder the terms:
62.25 + 1.5x + -0.75x2 = 0

Solving
62.25 + 1.5x + -0.75x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-0.75 the coefficient of the squared term: 

Divide each side by '-0.75'.
-83 + -2x + x2 = 0

Move the constant term to the right:

Add '83' to each side of the equation.
-83 + -2x + 83 + x2 = 0 + 83

Reorder the terms:
-83 + 83 + -2x + x2 = 0 + 83

Combine like terms: -83 + 83 = 0
0 + -2x + x2 = 0 + 83
-2x + x2 = 0 + 83

Combine like terms: 0 + 83 = 83
-2x + x2 = 83

The x term is -2x.  Take half its coefficient (-1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
-2x + 1 + x2 = 83 + 1

Reorder the terms:
1 + -2x + x2 = 83 + 1

Combine like terms: 83 + 1 = 84
1 + -2x + x2 = 84

Factor a perfect square on the left side:
(x + -1)(x + -1) = 84

Calculate the square root of the right side: 9.16515139

Break this problem into two subproblems by setting 
(x + -1) equal to 9.16515139 and -9.16515139.

Subproblem 1

x + -1 = 9.16515139 Simplifying x + -1 = 9.16515139 Reorder the terms: -1 + x = 9.16515139 Solving -1 + x = 9.16515139 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + x = 9.16515139 + 1 Combine like terms: -1 + 1 = 0 0 + x = 9.16515139 + 1 x = 9.16515139 + 1 Combine like terms: 9.16515139 + 1 = 10.16515139 x = 10.16515139 Simplifying x = 10.16515139

Subproblem 2

x + -1 = -9.16515139 Simplifying x + -1 = -9.16515139 Reorder the terms: -1 + x = -9.16515139 Solving -1 + x = -9.16515139 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + x = -9.16515139 + 1 Combine like terms: -1 + 1 = 0 0 + x = -9.16515139 + 1 x = -9.16515139 + 1 Combine like terms: -9.16515139 + 1 = -8.16515139 x = -8.16515139 Simplifying x = -8.16515139

Solution

The solution to the problem is based on the solutions from the subproblems. x = {10.16515139, -8.16515139}

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