5-3x(x-8)=0

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Solution for 5-3x(x-8)=0 equation:


Simplifying
5 + -3x(x + -8) = 0

Reorder the terms:
5 + -3x(-8 + x) = 0
5 + (-8 * -3x + x * -3x) = 0
5 + (24x + -3x2) = 0

Solving
5 + 24x + -3x2 = 0

Solving for variable 'x'.

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

Divide each side by '-3'.
-1.666666667 + -8x + x2 = 0

Move the constant term to the right:

Add '1.666666667' to each side of the equation.
-1.666666667 + -8x + 1.666666667 + x2 = 0 + 1.666666667

Reorder the terms:
-1.666666667 + 1.666666667 + -8x + x2 = 0 + 1.666666667

Combine like terms: -1.666666667 + 1.666666667 = 0.000000000
0.000000000 + -8x + x2 = 0 + 1.666666667
-8x + x2 = 0 + 1.666666667

Combine like terms: 0 + 1.666666667 = 1.666666667
-8x + x2 = 1.666666667

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 = 1.666666667 + 16

Reorder the terms:
16 + -8x + x2 = 1.666666667 + 16

Combine like terms: 1.666666667 + 16 = 17.666666667
16 + -8x + x2 = 17.666666667

Factor a perfect square on the left side:
(x + -4)(x + -4) = 17.666666667

Calculate the square root of the right side: 4.203173404

Break this problem into two subproblems by setting 
(x + -4) equal to 4.203173404 and -4.203173404.

Subproblem 1

x + -4 = 4.203173404 Simplifying x + -4 = 4.203173404 Reorder the terms: -4 + x = 4.203173404 Solving -4 + x = 4.203173404 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 = 4.203173404 + 4 Combine like terms: -4 + 4 = 0 0 + x = 4.203173404 + 4 x = 4.203173404 + 4 Combine like terms: 4.203173404 + 4 = 8.203173404 x = 8.203173404 Simplifying x = 8.203173404

Subproblem 2

x + -4 = -4.203173404 Simplifying x + -4 = -4.203173404 Reorder the terms: -4 + x = -4.203173404 Solving -4 + x = -4.203173404 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 = -4.203173404 + 4 Combine like terms: -4 + 4 = 0 0 + x = -4.203173404 + 4 x = -4.203173404 + 4 Combine like terms: -4.203173404 + 4 = -0.203173404 x = -0.203173404 Simplifying x = -0.203173404

Solution

The solution to the problem is based on the solutions from the subproblems. x = {8.203173404, -0.203173404}

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