-8x^2+3x+8+6x+10=

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Solution for -8x^2+3x+8+6x+10= equation:


Simplifying
-8x2 + 3x + 8 + 6x + 10 = 0

Reorder the terms:
8 + 10 + 3x + 6x + -8x2 = 0

Combine like terms: 8 + 10 = 18
18 + 3x + 6x + -8x2 = 0

Combine like terms: 3x + 6x = 9x
18 + 9x + -8x2 = 0

Solving
18 + 9x + -8x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-8 the coefficient of the squared term: 

Divide each side by '-8'.
-2.25 + -1.125x + x2 = 0

Move the constant term to the right:

Add '2.25' to each side of the equation.
-2.25 + -1.125x + 2.25 + x2 = 0 + 2.25

Reorder the terms:
-2.25 + 2.25 + -1.125x + x2 = 0 + 2.25

Combine like terms: -2.25 + 2.25 = 0.00
0.00 + -1.125x + x2 = 0 + 2.25
-1.125x + x2 = 0 + 2.25

Combine like terms: 0 + 2.25 = 2.25
-1.125x + x2 = 2.25

The x term is -1.125x.  Take half its coefficient (-0.5625).
Square it (0.31640625) and add it to both sides.

Add '0.31640625' to each side of the equation.
-1.125x + 0.31640625 + x2 = 2.25 + 0.31640625

Reorder the terms:
0.31640625 + -1.125x + x2 = 2.25 + 0.31640625

Combine like terms: 2.25 + 0.31640625 = 2.56640625
0.31640625 + -1.125x + x2 = 2.56640625

Factor a perfect square on the left side:
(x + -0.5625)(x + -0.5625) = 2.56640625

Calculate the square root of the right side: 1.602000702

Break this problem into two subproblems by setting 
(x + -0.5625) equal to 1.602000702 and -1.602000702.

Subproblem 1

x + -0.5625 = 1.602000702 Simplifying x + -0.5625 = 1.602000702 Reorder the terms: -0.5625 + x = 1.602000702 Solving -0.5625 + x = 1.602000702 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5625' to each side of the equation. -0.5625 + 0.5625 + x = 1.602000702 + 0.5625 Combine like terms: -0.5625 + 0.5625 = 0.0000 0.0000 + x = 1.602000702 + 0.5625 x = 1.602000702 + 0.5625 Combine like terms: 1.602000702 + 0.5625 = 2.164500702 x = 2.164500702 Simplifying x = 2.164500702

Subproblem 2

x + -0.5625 = -1.602000702 Simplifying x + -0.5625 = -1.602000702 Reorder the terms: -0.5625 + x = -1.602000702 Solving -0.5625 + x = -1.602000702 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5625' to each side of the equation. -0.5625 + 0.5625 + x = -1.602000702 + 0.5625 Combine like terms: -0.5625 + 0.5625 = 0.0000 0.0000 + x = -1.602000702 + 0.5625 x = -1.602000702 + 0.5625 Combine like terms: -1.602000702 + 0.5625 = -1.039500702 x = -1.039500702 Simplifying x = -1.039500702

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.164500702, -1.039500702}

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