4x(x-5)-3(x+6)=

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Solution for 4x(x-5)-3(x+6)= equation:


Simplifying
4x(x + -5) + -3(x + 6) = 0

Reorder the terms:
4x(-5 + x) + -3(x + 6) = 0
(-5 * 4x + x * 4x) + -3(x + 6) = 0
(-20x + 4x2) + -3(x + 6) = 0

Reorder the terms:
-20x + 4x2 + -3(6 + x) = 0
-20x + 4x2 + (6 * -3 + x * -3) = 0
-20x + 4x2 + (-18 + -3x) = 0

Reorder the terms:
-18 + -20x + -3x + 4x2 = 0

Combine like terms: -20x + -3x = -23x
-18 + -23x + 4x2 = 0

Solving
-18 + -23x + 4x2 = 0

Solving for variable 'x'.

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

Divide each side by '4'.
-4.5 + -5.75x + x2 = 0

Move the constant term to the right:

Add '4.5' to each side of the equation.
-4.5 + -5.75x + 4.5 + x2 = 0 + 4.5

Reorder the terms:
-4.5 + 4.5 + -5.75x + x2 = 0 + 4.5

Combine like terms: -4.5 + 4.5 = 0.0
0.0 + -5.75x + x2 = 0 + 4.5
-5.75x + x2 = 0 + 4.5

Combine like terms: 0 + 4.5 = 4.5
-5.75x + x2 = 4.5

The x term is -5.75x.  Take half its coefficient (-2.875).
Square it (8.265625) and add it to both sides.

Add '8.265625' to each side of the equation.
-5.75x + 8.265625 + x2 = 4.5 + 8.265625

Reorder the terms:
8.265625 + -5.75x + x2 = 4.5 + 8.265625

Combine like terms: 4.5 + 8.265625 = 12.765625
8.265625 + -5.75x + x2 = 12.765625

Factor a perfect square on the left side:
(x + -2.875)(x + -2.875) = 12.765625

Calculate the square root of the right side: 3.572901482

Break this problem into two subproblems by setting 
(x + -2.875) equal to 3.572901482 and -3.572901482.

Subproblem 1

x + -2.875 = 3.572901482 Simplifying x + -2.875 = 3.572901482 Reorder the terms: -2.875 + x = 3.572901482 Solving -2.875 + x = 3.572901482 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.875' to each side of the equation. -2.875 + 2.875 + x = 3.572901482 + 2.875 Combine like terms: -2.875 + 2.875 = 0.000 0.000 + x = 3.572901482 + 2.875 x = 3.572901482 + 2.875 Combine like terms: 3.572901482 + 2.875 = 6.447901482 x = 6.447901482 Simplifying x = 6.447901482

Subproblem 2

x + -2.875 = -3.572901482 Simplifying x + -2.875 = -3.572901482 Reorder the terms: -2.875 + x = -3.572901482 Solving -2.875 + x = -3.572901482 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.875' to each side of the equation. -2.875 + 2.875 + x = -3.572901482 + 2.875 Combine like terms: -2.875 + 2.875 = 0.000 0.000 + x = -3.572901482 + 2.875 x = -3.572901482 + 2.875 Combine like terms: -3.572901482 + 2.875 = -0.697901482 x = -0.697901482 Simplifying x = -0.697901482

Solution

The solution to the problem is based on the solutions from the subproblems. x = {6.447901482, -0.697901482}

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