4-3x-6x-5x(x)=

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Solution for 4-3x-6x-5x(x)= equation:


Simplifying
4 + -3x + -6x + -5x(x) = 0

Multiply x * x
4 + -3x + -6x + -5x2 = 0

Combine like terms: -3x + -6x = -9x
4 + -9x + -5x2 = 0

Solving
4 + -9x + -5x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-5 the coefficient of the squared term: 

Divide each side by '-5'.
-0.8 + 1.8x + x2 = 0

Move the constant term to the right:

Add '0.8' to each side of the equation.
-0.8 + 1.8x + 0.8 + x2 = 0 + 0.8

Reorder the terms:
-0.8 + 0.8 + 1.8x + x2 = 0 + 0.8

Combine like terms: -0.8 + 0.8 = 0.0
0.0 + 1.8x + x2 = 0 + 0.8
1.8x + x2 = 0 + 0.8

Combine like terms: 0 + 0.8 = 0.8
1.8x + x2 = 0.8

The x term is 1.8x.  Take half its coefficient (0.9).
Square it (0.81) and add it to both sides.

Add '0.81' to each side of the equation.
1.8x + 0.81 + x2 = 0.8 + 0.81

Reorder the terms:
0.81 + 1.8x + x2 = 0.8 + 0.81

Combine like terms: 0.8 + 0.81 = 1.61
0.81 + 1.8x + x2 = 1.61

Factor a perfect square on the left side:
(x + 0.9)(x + 0.9) = 1.61

Calculate the square root of the right side: 1.268857754

Break this problem into two subproblems by setting 
(x + 0.9) equal to 1.268857754 and -1.268857754.

Subproblem 1

x + 0.9 = 1.268857754 Simplifying x + 0.9 = 1.268857754 Reorder the terms: 0.9 + x = 1.268857754 Solving 0.9 + x = 1.268857754 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.9' to each side of the equation. 0.9 + -0.9 + x = 1.268857754 + -0.9 Combine like terms: 0.9 + -0.9 = 0.0 0.0 + x = 1.268857754 + -0.9 x = 1.268857754 + -0.9 Combine like terms: 1.268857754 + -0.9 = 0.368857754 x = 0.368857754 Simplifying x = 0.368857754

Subproblem 2

x + 0.9 = -1.268857754 Simplifying x + 0.9 = -1.268857754 Reorder the terms: 0.9 + x = -1.268857754 Solving 0.9 + x = -1.268857754 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.9' to each side of the equation. 0.9 + -0.9 + x = -1.268857754 + -0.9 Combine like terms: 0.9 + -0.9 = 0.0 0.0 + x = -1.268857754 + -0.9 x = -1.268857754 + -0.9 Combine like terms: -1.268857754 + -0.9 = -2.168857754 x = -2.168857754 Simplifying x = -2.168857754

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.368857754, -2.168857754}

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