-6(4x+1)+7x+9x(x-3)=4

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Solution for -6(4x+1)+7x+9x(x-3)=4 equation:


Simplifying
-6(4x + 1) + 7x + 9x(x + -3) = 4

Reorder the terms:
-6(1 + 4x) + 7x + 9x(x + -3) = 4
(1 * -6 + 4x * -6) + 7x + 9x(x + -3) = 4
(-6 + -24x) + 7x + 9x(x + -3) = 4

Reorder the terms:
-6 + -24x + 7x + 9x(-3 + x) = 4
-6 + -24x + 7x + (-3 * 9x + x * 9x) = 4
-6 + -24x + 7x + (-27x + 9x2) = 4

Combine like terms: -24x + 7x = -17x
-6 + -17x + -27x + 9x2 = 4

Combine like terms: -17x + -27x = -44x
-6 + -44x + 9x2 = 4

Solving
-6 + -44x + 9x2 = 4

Solving for variable 'x'.

Reorder the terms:
-6 + -4 + -44x + 9x2 = 4 + -4

Combine like terms: -6 + -4 = -10
-10 + -44x + 9x2 = 4 + -4

Combine like terms: 4 + -4 = 0
-10 + -44x + 9x2 = 0

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

Divide each side by '9'.
-1.111111111 + -4.888888889x + x2 = 0

Move the constant term to the right:

Add '1.111111111' to each side of the equation.
-1.111111111 + -4.888888889x + 1.111111111 + x2 = 0 + 1.111111111

Reorder the terms:
-1.111111111 + 1.111111111 + -4.888888889x + x2 = 0 + 1.111111111

Combine like terms: -1.111111111 + 1.111111111 = 0.000000000
0.000000000 + -4.888888889x + x2 = 0 + 1.111111111
-4.888888889x + x2 = 0 + 1.111111111

Combine like terms: 0 + 1.111111111 = 1.111111111
-4.888888889x + x2 = 1.111111111

The x term is -4.888888889x.  Take half its coefficient (-2.444444445).
Square it (5.975308645) and add it to both sides.

Add '5.975308645' to each side of the equation.
-4.888888889x + 5.975308645 + x2 = 1.111111111 + 5.975308645

Reorder the terms:
5.975308645 + -4.888888889x + x2 = 1.111111111 + 5.975308645

Combine like terms: 1.111111111 + 5.975308645 = 7.086419756
5.975308645 + -4.888888889x + x2 = 7.086419756

Factor a perfect square on the left side:
(x + -2.444444445)(x + -2.444444445) = 7.086419756

Calculate the square root of the right side: 2.662033012

Break this problem into two subproblems by setting 
(x + -2.444444445) equal to 2.662033012 and -2.662033012.

Subproblem 1

x + -2.444444445 = 2.662033012 Simplifying x + -2.444444445 = 2.662033012 Reorder the terms: -2.444444445 + x = 2.662033012 Solving -2.444444445 + x = 2.662033012 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.444444445' to each side of the equation. -2.444444445 + 2.444444445 + x = 2.662033012 + 2.444444445 Combine like terms: -2.444444445 + 2.444444445 = 0.000000000 0.000000000 + x = 2.662033012 + 2.444444445 x = 2.662033012 + 2.444444445 Combine like terms: 2.662033012 + 2.444444445 = 5.106477457 x = 5.106477457 Simplifying x = 5.106477457

Subproblem 2

x + -2.444444445 = -2.662033012 Simplifying x + -2.444444445 = -2.662033012 Reorder the terms: -2.444444445 + x = -2.662033012 Solving -2.444444445 + x = -2.662033012 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.444444445' to each side of the equation. -2.444444445 + 2.444444445 + x = -2.662033012 + 2.444444445 Combine like terms: -2.444444445 + 2.444444445 = 0.000000000 0.000000000 + x = -2.662033012 + 2.444444445 x = -2.662033012 + 2.444444445 Combine like terms: -2.662033012 + 2.444444445 = -0.217588567 x = -0.217588567 Simplifying x = -0.217588567

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.106477457, -0.217588567}

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