(25-2X)+(X^2-8X)+(X-15)+(X-4)=64

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Solution for (25-2X)+(X^2-8X)+(X-15)+(X-4)=64 equation:


Simplifying
(25 + -2X) + (X2 + -8X) + (X + -15) + (X + -4) = 64

Remove parenthesis around (25 + -2X)
25 + -2X + (X2 + -8X) + (X + -15) + (X + -4) = 64

Reorder the terms:
25 + -2X + (-8X + X2) + (X + -15) + (X + -4) = 64

Remove parenthesis around (-8X + X2)
25 + -2X + -8X + X2 + (X + -15) + (X + -4) = 64

Reorder the terms:
25 + -2X + -8X + X2 + (-15 + X) + (X + -4) = 64

Remove parenthesis around (-15 + X)
25 + -2X + -8X + X2 + -15 + X + (X + -4) = 64

Reorder the terms:
25 + -2X + -8X + X2 + -15 + X + (-4 + X) = 64

Remove parenthesis around (-4 + X)
25 + -2X + -8X + X2 + -15 + X + -4 + X = 64

Reorder the terms:
25 + -15 + -4 + -2X + -8X + X + X + X2 = 64

Combine like terms: 25 + -15 = 10
10 + -4 + -2X + -8X + X + X + X2 = 64

Combine like terms: 10 + -4 = 6
6 + -2X + -8X + X + X + X2 = 64

Combine like terms: -2X + -8X = -10X
6 + -10X + X + X + X2 = 64

Combine like terms: -10X + X = -9X
6 + -9X + X + X2 = 64

Combine like terms: -9X + X = -8X
6 + -8X + X2 = 64

Solving
6 + -8X + X2 = 64

Solving for variable 'X'.

Reorder the terms:
6 + -64 + -8X + X2 = 64 + -64

Combine like terms: 6 + -64 = -58
-58 + -8X + X2 = 64 + -64

Combine like terms: 64 + -64 = 0
-58 + -8X + X2 = 0

Begin completing the square.

Move the constant term to the right:

Add '58' to each side of the equation.
-58 + -8X + 58 + X2 = 0 + 58

Reorder the terms:
-58 + 58 + -8X + X2 = 0 + 58

Combine like terms: -58 + 58 = 0
0 + -8X + X2 = 0 + 58
-8X + X2 = 0 + 58

Combine like terms: 0 + 58 = 58
-8X + X2 = 58

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 = 58 + 16

Reorder the terms:
16 + -8X + X2 = 58 + 16

Combine like terms: 58 + 16 = 74
16 + -8X + X2 = 74

Factor a perfect square on the left side:
(X + -4)(X + -4) = 74

Calculate the square root of the right side: 8.602325267

Break this problem into two subproblems by setting 
(X + -4) equal to 8.602325267 and -8.602325267.

Subproblem 1

X + -4 = 8.602325267 Simplifying X + -4 = 8.602325267 Reorder the terms: -4 + X = 8.602325267 Solving -4 + X = 8.602325267 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 = 8.602325267 + 4 Combine like terms: -4 + 4 = 0 0 + X = 8.602325267 + 4 X = 8.602325267 + 4 Combine like terms: 8.602325267 + 4 = 12.602325267 X = 12.602325267 Simplifying X = 12.602325267

Subproblem 2

X + -4 = -8.602325267 Simplifying X + -4 = -8.602325267 Reorder the terms: -4 + X = -8.602325267 Solving -4 + X = -8.602325267 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 = -8.602325267 + 4 Combine like terms: -4 + 4 = 0 0 + X = -8.602325267 + 4 X = -8.602325267 + 4 Combine like terms: -8.602325267 + 4 = -4.602325267 X = -4.602325267 Simplifying X = -4.602325267

Solution

The solution to the problem is based on the solutions from the subproblems. X = {12.602325267, -4.602325267}

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