0=3x^2-24x-7

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Solution for 0=3x^2-24x-7 equation:


Simplifying
0 = 3x2 + -24x + -7

Reorder the terms:
0 = -7 + -24x + 3x2

Solving
0 = -7 + -24x + 3x2

Solving for variable 'x'.

Combine like terms: 0 + 7 = 7
7 + 24x + -3x2 = -7 + -24x + 3x2 + 7 + 24x + -3x2

Reorder the terms:
7 + 24x + -3x2 = -7 + 7 + -24x + 24x + 3x2 + -3x2

Combine like terms: -7 + 7 = 0
7 + 24x + -3x2 = 0 + -24x + 24x + 3x2 + -3x2
7 + 24x + -3x2 = -24x + 24x + 3x2 + -3x2

Combine like terms: -24x + 24x = 0
7 + 24x + -3x2 = 0 + 3x2 + -3x2
7 + 24x + -3x2 = 3x2 + -3x2

Combine like terms: 3x2 + -3x2 = 0
7 + 24x + -3x2 = 0

Begin completing the square.  Divide all terms by
-3 the coefficient of the squared term: 

Divide each side by '-3'.
-2.333333333 + -8x + x2 = 0

Move the constant term to the right:

Add '2.333333333' to each side of the equation.
-2.333333333 + -8x + 2.333333333 + x2 = 0 + 2.333333333

Reorder the terms:
-2.333333333 + 2.333333333 + -8x + x2 = 0 + 2.333333333

Combine like terms: -2.333333333 + 2.333333333 = 0.000000000
0.000000000 + -8x + x2 = 0 + 2.333333333
-8x + x2 = 0 + 2.333333333

Combine like terms: 0 + 2.333333333 = 2.333333333
-8x + x2 = 2.333333333

The x term is -8x.  Take half its coefficient (-4).
Square it (16) and add it to both sides.

Add '16' to each side of the equation.
-8x + 16 + x2 = 2.333333333 + 16

Reorder the terms:
16 + -8x + x2 = 2.333333333 + 16

Combine like terms: 2.333333333 + 16 = 18.333333333
16 + -8x + x2 = 18.333333333

Factor a perfect square on the left side:
(x + -4)(x + -4) = 18.333333333

Calculate the square root of the right side: 4.281744193

Break this problem into two subproblems by setting 
(x + -4) equal to 4.281744193 and -4.281744193.

Subproblem 1

x + -4 = 4.281744193 Simplifying x + -4 = 4.281744193 Reorder the terms: -4 + x = 4.281744193 Solving -4 + x = 4.281744193 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + x = 4.281744193 + 4 Combine like terms: -4 + 4 = 0 0 + x = 4.281744193 + 4 x = 4.281744193 + 4 Combine like terms: 4.281744193 + 4 = 8.281744193 x = 8.281744193 Simplifying x = 8.281744193

Subproblem 2

x + -4 = -4.281744193 Simplifying x + -4 = -4.281744193 Reorder the terms: -4 + x = -4.281744193 Solving -4 + x = -4.281744193 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + x = -4.281744193 + 4 Combine like terms: -4 + 4 = 0 0 + x = -4.281744193 + 4 x = -4.281744193 + 4 Combine like terms: -4.281744193 + 4 = -0.281744193 x = -0.281744193 Simplifying x = -0.281744193

Solution

The solution to the problem is based on the solutions from the subproblems. x = {8.281744193, -0.281744193}

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