3x+4x(4x+24)=360

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Solution for 3x+4x(4x+24)=360 equation:


Simplifying
3x + 4x(4x + 24) = 360

Reorder the terms:
3x + 4x(24 + 4x) = 360
3x + (24 * 4x + 4x * 4x) = 360
3x + (96x + 16x2) = 360

Combine like terms: 3x + 96x = 99x
99x + 16x2 = 360

Solving
99x + 16x2 = 360

Solving for variable 'x'.

Reorder the terms:
-360 + 99x + 16x2 = 360 + -360

Combine like terms: 360 + -360 = 0
-360 + 99x + 16x2 = 0

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

Divide each side by '16'.
-22.5 + 6.1875x + x2 = 0

Move the constant term to the right:

Add '22.5' to each side of the equation.
-22.5 + 6.1875x + 22.5 + x2 = 0 + 22.5

Reorder the terms:
-22.5 + 22.5 + 6.1875x + x2 = 0 + 22.5

Combine like terms: -22.5 + 22.5 = 0.0
0.0 + 6.1875x + x2 = 0 + 22.5
6.1875x + x2 = 0 + 22.5

Combine like terms: 0 + 22.5 = 22.5
6.1875x + x2 = 22.5

The x term is 6.1875x.  Take half its coefficient (3.09375).
Square it (9.571289063) and add it to both sides.

Add '9.571289063' to each side of the equation.
6.1875x + 9.571289063 + x2 = 22.5 + 9.571289063

Reorder the terms:
9.571289063 + 6.1875x + x2 = 22.5 + 9.571289063

Combine like terms: 22.5 + 9.571289063 = 32.071289063
9.571289063 + 6.1875x + x2 = 32.071289063

Factor a perfect square on the left side:
(x + 3.09375)(x + 3.09375) = 32.071289063

Calculate the square root of the right side: 5.663151866

Break this problem into two subproblems by setting 
(x + 3.09375) equal to 5.663151866 and -5.663151866.

Subproblem 1

x + 3.09375 = 5.663151866 Simplifying x + 3.09375 = 5.663151866 Reorder the terms: 3.09375 + x = 5.663151866 Solving 3.09375 + x = 5.663151866 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.09375' to each side of the equation. 3.09375 + -3.09375 + x = 5.663151866 + -3.09375 Combine like terms: 3.09375 + -3.09375 = 0.00000 0.00000 + x = 5.663151866 + -3.09375 x = 5.663151866 + -3.09375 Combine like terms: 5.663151866 + -3.09375 = 2.569401866 x = 2.569401866 Simplifying x = 2.569401866

Subproblem 2

x + 3.09375 = -5.663151866 Simplifying x + 3.09375 = -5.663151866 Reorder the terms: 3.09375 + x = -5.663151866 Solving 3.09375 + x = -5.663151866 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.09375' to each side of the equation. 3.09375 + -3.09375 + x = -5.663151866 + -3.09375 Combine like terms: 3.09375 + -3.09375 = 0.00000 0.00000 + x = -5.663151866 + -3.09375 x = -5.663151866 + -3.09375 Combine like terms: -5.663151866 + -3.09375 = -8.756901866 x = -8.756901866 Simplifying x = -8.756901866

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.569401866, -8.756901866}

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