(X-3)(X-4)=14

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Solution for (X-3)(X-4)=14 equation:


Simplifying
(X + -3)(X + -4) = 14

Reorder the terms:
(-3 + X)(X + -4) = 14

Reorder the terms:
(-3 + X)(-4 + X) = 14

Multiply (-3 + X) * (-4 + X)
(-3(-4 + X) + X(-4 + X)) = 14
((-4 * -3 + X * -3) + X(-4 + X)) = 14
((12 + -3X) + X(-4 + X)) = 14
(12 + -3X + (-4 * X + X * X)) = 14
(12 + -3X + (-4X + X2)) = 14

Combine like terms: -3X + -4X = -7X
(12 + -7X + X2) = 14

Solving
12 + -7X + X2 = 14

Solving for variable 'X'.

Reorder the terms:
12 + -14 + -7X + X2 = 14 + -14

Combine like terms: 12 + -14 = -2
-2 + -7X + X2 = 14 + -14

Combine like terms: 14 + -14 = 0
-2 + -7X + X2 = 0

Begin completing the square.

Move the constant term to the right:

Add '2' to each side of the equation.
-2 + -7X + 2 + X2 = 0 + 2

Reorder the terms:
-2 + 2 + -7X + X2 = 0 + 2

Combine like terms: -2 + 2 = 0
0 + -7X + X2 = 0 + 2
-7X + X2 = 0 + 2

Combine like terms: 0 + 2 = 2
-7X + X2 = 2

The X term is -7X.  Take half its coefficient (-3.5).
Square it (12.25) and add it to both sides.

Add '12.25' to each side of the equation.
-7X + 12.25 + X2 = 2 + 12.25

Reorder the terms:
12.25 + -7X + X2 = 2 + 12.25

Combine like terms: 2 + 12.25 = 14.25
12.25 + -7X + X2 = 14.25

Factor a perfect square on the left side:
(X + -3.5)(X + -3.5) = 14.25

Calculate the square root of the right side: 3.774917218

Break this problem into two subproblems by setting 
(X + -3.5) equal to 3.774917218 and -3.774917218.

Subproblem 1

X + -3.5 = 3.774917218 Simplifying X + -3.5 = 3.774917218 Reorder the terms: -3.5 + X = 3.774917218 Solving -3.5 + X = 3.774917218 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '3.5' to each side of the equation. -3.5 + 3.5 + X = 3.774917218 + 3.5 Combine like terms: -3.5 + 3.5 = 0.0 0.0 + X = 3.774917218 + 3.5 X = 3.774917218 + 3.5 Combine like terms: 3.774917218 + 3.5 = 7.274917218 X = 7.274917218 Simplifying X = 7.274917218

Subproblem 2

X + -3.5 = -3.774917218 Simplifying X + -3.5 = -3.774917218 Reorder the terms: -3.5 + X = -3.774917218 Solving -3.5 + X = -3.774917218 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '3.5' to each side of the equation. -3.5 + 3.5 + X = -3.774917218 + 3.5 Combine like terms: -3.5 + 3.5 = 0.0 0.0 + X = -3.774917218 + 3.5 X = -3.774917218 + 3.5 Combine like terms: -3.774917218 + 3.5 = -0.274917218 X = -0.274917218 Simplifying X = -0.274917218

Solution

The solution to the problem is based on the solutions from the subproblems. X = {7.274917218, -0.274917218}

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