(x+7)*(x-3)=4225

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Solution for (x+7)*(x-3)=4225 equation:


Simplifying
(x + 7)(x + -3) = 4225

Reorder the terms:
(7 + x)(x + -3) = 4225

Reorder the terms:
(7 + x)(-3 + x) = 4225

Multiply (7 + x) * (-3 + x)
(7(-3 + x) + x(-3 + x)) = 4225
((-3 * 7 + x * 7) + x(-3 + x)) = 4225
((-21 + 7x) + x(-3 + x)) = 4225
(-21 + 7x + (-3 * x + x * x)) = 4225
(-21 + 7x + (-3x + x2)) = 4225

Combine like terms: 7x + -3x = 4x
(-21 + 4x + x2) = 4225

Solving
-21 + 4x + x2 = 4225

Solving for variable 'x'.

Reorder the terms:
-21 + -4225 + 4x + x2 = 4225 + -4225

Combine like terms: -21 + -4225 = -4246
-4246 + 4x + x2 = 4225 + -4225

Combine like terms: 4225 + -4225 = 0
-4246 + 4x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '4246' to each side of the equation.
-4246 + 4x + 4246 + x2 = 0 + 4246

Reorder the terms:
-4246 + 4246 + 4x + x2 = 0 + 4246

Combine like terms: -4246 + 4246 = 0
0 + 4x + x2 = 0 + 4246
4x + x2 = 0 + 4246

Combine like terms: 0 + 4246 = 4246
4x + x2 = 4246

The x term is 4x.  Take half its coefficient (2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
4x + 4 + x2 = 4246 + 4

Reorder the terms:
4 + 4x + x2 = 4246 + 4

Combine like terms: 4246 + 4 = 4250
4 + 4x + x2 = 4250

Factor a perfect square on the left side:
(x + 2)(x + 2) = 4250

Calculate the square root of the right side: 65.192024052

Break this problem into two subproblems by setting 
(x + 2) equal to 65.192024052 and -65.192024052.

Subproblem 1

x + 2 = 65.192024052 Simplifying x + 2 = 65.192024052 Reorder the terms: 2 + x = 65.192024052 Solving 2 + x = 65.192024052 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + x = 65.192024052 + -2 Combine like terms: 2 + -2 = 0 0 + x = 65.192024052 + -2 x = 65.192024052 + -2 Combine like terms: 65.192024052 + -2 = 63.192024052 x = 63.192024052 Simplifying x = 63.192024052

Subproblem 2

x + 2 = -65.192024052 Simplifying x + 2 = -65.192024052 Reorder the terms: 2 + x = -65.192024052 Solving 2 + x = -65.192024052 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + x = -65.192024052 + -2 Combine like terms: 2 + -2 = 0 0 + x = -65.192024052 + -2 x = -65.192024052 + -2 Combine like terms: -65.192024052 + -2 = -67.192024052 x = -67.192024052 Simplifying x = -67.192024052

Solution

The solution to the problem is based on the solutions from the subproblems. x = {63.192024052, -67.192024052}

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