(11-2x)(8.5-2x)=0

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Solution for (11-2x)(8.5-2x)=0 equation:


Simplifying
(11 + -2x)(8.5 + -2x) = 0

Multiply (11 + -2x) * (8.5 + -2x)
(11(8.5 + -2x) + -2x * (8.5 + -2x)) = 0
((8.5 * 11 + -2x * 11) + -2x * (8.5 + -2x)) = 0
((93.5 + -22x) + -2x * (8.5 + -2x)) = 0
(93.5 + -22x + (8.5 * -2x + -2x * -2x)) = 0
(93.5 + -22x + (-17x + 4x2)) = 0

Combine like terms: -22x + -17x = -39x
(93.5 + -39x + 4x2) = 0

Solving
93.5 + -39x + 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'.
23.375 + -9.75x + x2 = 0

Move the constant term to the right:

Add '-23.375' to each side of the equation.
23.375 + -9.75x + -23.375 + x2 = 0 + -23.375

Reorder the terms:
23.375 + -23.375 + -9.75x + x2 = 0 + -23.375

Combine like terms: 23.375 + -23.375 = 0.000
0.000 + -9.75x + x2 = 0 + -23.375
-9.75x + x2 = 0 + -23.375

Combine like terms: 0 + -23.375 = -23.375
-9.75x + x2 = -23.375

The x term is -9.75x.  Take half its coefficient (-4.875).
Square it (23.765625) and add it to both sides.

Add '23.765625' to each side of the equation.
-9.75x + 23.765625 + x2 = -23.375 + 23.765625

Reorder the terms:
23.765625 + -9.75x + x2 = -23.375 + 23.765625

Combine like terms: -23.375 + 23.765625 = 0.390625
23.765625 + -9.75x + x2 = 0.390625

Factor a perfect square on the left side:
(x + -4.875)(x + -4.875) = 0.390625

Calculate the square root of the right side: 0.625

Break this problem into two subproblems by setting 
(x + -4.875) equal to 0.625 and -0.625.

Subproblem 1

x + -4.875 = 0.625 Simplifying x + -4.875 = 0.625 Reorder the terms: -4.875 + x = 0.625 Solving -4.875 + x = 0.625 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.875' to each side of the equation. -4.875 + 4.875 + x = 0.625 + 4.875 Combine like terms: -4.875 + 4.875 = 0.000 0.000 + x = 0.625 + 4.875 x = 0.625 + 4.875 Combine like terms: 0.625 + 4.875 = 5.5 x = 5.5 Simplifying x = 5.5

Subproblem 2

x + -4.875 = -0.625 Simplifying x + -4.875 = -0.625 Reorder the terms: -4.875 + x = -0.625 Solving -4.875 + x = -0.625 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.875' to each side of the equation. -4.875 + 4.875 + x = -0.625 + 4.875 Combine like terms: -4.875 + 4.875 = 0.000 0.000 + x = -0.625 + 4.875 x = -0.625 + 4.875 Combine like terms: -0.625 + 4.875 = 4.25 x = 4.25 Simplifying x = 4.25

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.5, 4.25}

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