4x(x-6)+3x(x+1)=4

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Solution for 4x(x-6)+3x(x+1)=4 equation:


Simplifying
4x(x + -6) + 3x(x + 1) = 4

Reorder the terms:
4x(-6 + x) + 3x(x + 1) = 4
(-6 * 4x + x * 4x) + 3x(x + 1) = 4
(-24x + 4x2) + 3x(x + 1) = 4

Reorder the terms:
-24x + 4x2 + 3x(1 + x) = 4
-24x + 4x2 + (1 * 3x + x * 3x) = 4
-24x + 4x2 + (3x + 3x2) = 4

Reorder the terms:
-24x + 3x + 4x2 + 3x2 = 4

Combine like terms: -24x + 3x = -21x
-21x + 4x2 + 3x2 = 4

Combine like terms: 4x2 + 3x2 = 7x2
-21x + 7x2 = 4

Solving
-21x + 7x2 = 4

Solving for variable 'x'.

Reorder the terms:
-4 + -21x + 7x2 = 4 + -4

Combine like terms: 4 + -4 = 0
-4 + -21x + 7x2 = 0

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

Divide each side by '7'.
-0.5714285714 + -3x + x2 = 0

Move the constant term to the right:

Add '0.5714285714' to each side of the equation.
-0.5714285714 + -3x + 0.5714285714 + x2 = 0 + 0.5714285714

Reorder the terms:
-0.5714285714 + 0.5714285714 + -3x + x2 = 0 + 0.5714285714

Combine like terms: -0.5714285714 + 0.5714285714 = 0.0000000000
0.0000000000 + -3x + x2 = 0 + 0.5714285714
-3x + x2 = 0 + 0.5714285714

Combine like terms: 0 + 0.5714285714 = 0.5714285714
-3x + x2 = 0.5714285714

The x term is -3x.  Take half its coefficient (-1.5).
Square it (2.25) and add it to both sides.

Add '2.25' to each side of the equation.
-3x + 2.25 + x2 = 0.5714285714 + 2.25

Reorder the terms:
2.25 + -3x + x2 = 0.5714285714 + 2.25

Combine like terms: 0.5714285714 + 2.25 = 2.8214285714
2.25 + -3x + x2 = 2.8214285714

Factor a perfect square on the left side:
(x + -1.5)(x + -1.5) = 2.8214285714

Calculate the square root of the right side: 1.679710859

Break this problem into two subproblems by setting 
(x + -1.5) equal to 1.679710859 and -1.679710859.

Subproblem 1

x + -1.5 = 1.679710859 Simplifying x + -1.5 = 1.679710859 Reorder the terms: -1.5 + x = 1.679710859 Solving -1.5 + x = 1.679710859 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + x = 1.679710859 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + x = 1.679710859 + 1.5 x = 1.679710859 + 1.5 Combine like terms: 1.679710859 + 1.5 = 3.179710859 x = 3.179710859 Simplifying x = 3.179710859

Subproblem 2

x + -1.5 = -1.679710859 Simplifying x + -1.5 = -1.679710859 Reorder the terms: -1.5 + x = -1.679710859 Solving -1.5 + x = -1.679710859 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + x = -1.679710859 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + x = -1.679710859 + 1.5 x = -1.679710859 + 1.5 Combine like terms: -1.679710859 + 1.5 = -0.179710859 x = -0.179710859 Simplifying x = -0.179710859

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.179710859, -0.179710859}

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