-4x(6-x)=7

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Solution for -4x(6-x)=7 equation:


Simplifying
-4x(6 + -1x) = 7
(6 * -4x + -1x * -4x) = 7
(-24x + 4x2) = 7

Solving
-24x + 4x2 = 7

Solving for variable 'x'.

Reorder the terms:
-7 + -24x + 4x2 = 7 + -7

Combine like terms: 7 + -7 = 0
-7 + -24x + 4x2 = 0

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

Divide each side by '4'.
-1.75 + -6x + x2 = 0

Move the constant term to the right:

Add '1.75' to each side of the equation.
-1.75 + -6x + 1.75 + x2 = 0 + 1.75

Reorder the terms:
-1.75 + 1.75 + -6x + x2 = 0 + 1.75

Combine like terms: -1.75 + 1.75 = 0.00
0.00 + -6x + x2 = 0 + 1.75
-6x + x2 = 0 + 1.75

Combine like terms: 0 + 1.75 = 1.75
-6x + x2 = 1.75

The x term is -6x.  Take half its coefficient (-3).
Square it (9) and add it to both sides.

Add '9' to each side of the equation.
-6x + 9 + x2 = 1.75 + 9

Reorder the terms:
9 + -6x + x2 = 1.75 + 9

Combine like terms: 1.75 + 9 = 10.75
9 + -6x + x2 = 10.75

Factor a perfect square on the left side:
(x + -3)(x + -3) = 10.75

Calculate the square root of the right side: 3.278719262

Break this problem into two subproblems by setting 
(x + -3) equal to 3.278719262 and -3.278719262.

Subproblem 1

x + -3 = 3.278719262 Simplifying x + -3 = 3.278719262 Reorder the terms: -3 + x = 3.278719262 Solving -3 + x = 3.278719262 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + x = 3.278719262 + 3 Combine like terms: -3 + 3 = 0 0 + x = 3.278719262 + 3 x = 3.278719262 + 3 Combine like terms: 3.278719262 + 3 = 6.278719262 x = 6.278719262 Simplifying x = 6.278719262

Subproblem 2

x + -3 = -3.278719262 Simplifying x + -3 = -3.278719262 Reorder the terms: -3 + x = -3.278719262 Solving -3 + x = -3.278719262 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + x = -3.278719262 + 3 Combine like terms: -3 + 3 = 0 0 + x = -3.278719262 + 3 x = -3.278719262 + 3 Combine like terms: -3.278719262 + 3 = -0.278719262 x = -0.278719262 Simplifying x = -0.278719262

Solution

The solution to the problem is based on the solutions from the subproblems. x = {6.278719262, -0.278719262}

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