(x-4)+(x+3)(x-7)=59

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Solution for (x-4)+(x+3)(x-7)=59 equation:


Simplifying
(x + -4) + (x + 3)(x + -7) = 59

Reorder the terms:
(-4 + x) + (x + 3)(x + -7) = 59

Remove parenthesis around (-4 + x)
-4 + x + (x + 3)(x + -7) = 59

Reorder the terms:
-4 + x + (3 + x)(x + -7) = 59

Reorder the terms:
-4 + x + (3 + x)(-7 + x) = 59

Multiply (3 + x) * (-7 + x)
-4 + x + (3(-7 + x) + x(-7 + x)) = 59
-4 + x + ((-7 * 3 + x * 3) + x(-7 + x)) = 59
-4 + x + ((-21 + 3x) + x(-7 + x)) = 59
-4 + x + (-21 + 3x + (-7 * x + x * x)) = 59
-4 + x + (-21 + 3x + (-7x + x2)) = 59

Combine like terms: 3x + -7x = -4x
-4 + x + (-21 + -4x + x2) = 59

Reorder the terms:
-4 + -21 + x + -4x + x2 = 59

Combine like terms: -4 + -21 = -25
-25 + x + -4x + x2 = 59

Combine like terms: x + -4x = -3x
-25 + -3x + x2 = 59

Solving
-25 + -3x + x2 = 59

Solving for variable 'x'.

Reorder the terms:
-25 + -59 + -3x + x2 = 59 + -59

Combine like terms: -25 + -59 = -84
-84 + -3x + x2 = 59 + -59

Combine like terms: 59 + -59 = 0
-84 + -3x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '84' to each side of the equation.
-84 + -3x + 84 + x2 = 0 + 84

Reorder the terms:
-84 + 84 + -3x + x2 = 0 + 84

Combine like terms: -84 + 84 = 0
0 + -3x + x2 = 0 + 84
-3x + x2 = 0 + 84

Combine like terms: 0 + 84 = 84
-3x + x2 = 84

The x term is -3x.  Take half its coefficient (-1.5).
Square it (2.25) and add it to both sides.

Add '2.25' to each side of the equation.
-3x + 2.25 + x2 = 84 + 2.25

Reorder the terms:
2.25 + -3x + x2 = 84 + 2.25

Combine like terms: 84 + 2.25 = 86.25
2.25 + -3x + x2 = 86.25

Factor a perfect square on the left side:
(x + -1.5)(x + -1.5) = 86.25

Calculate the square root of the right side: 9.287087811

Break this problem into two subproblems by setting 
(x + -1.5) equal to 9.287087811 and -9.287087811.

Subproblem 1

x + -1.5 = 9.287087811 Simplifying x + -1.5 = 9.287087811 Reorder the terms: -1.5 + x = 9.287087811 Solving -1.5 + x = 9.287087811 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + x = 9.287087811 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + x = 9.287087811 + 1.5 x = 9.287087811 + 1.5 Combine like terms: 9.287087811 + 1.5 = 10.787087811 x = 10.787087811 Simplifying x = 10.787087811

Subproblem 2

x + -1.5 = -9.287087811 Simplifying x + -1.5 = -9.287087811 Reorder the terms: -1.5 + x = -9.287087811 Solving -1.5 + x = -9.287087811 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + x = -9.287087811 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + x = -9.287087811 + 1.5 x = -9.287087811 + 1.5 Combine like terms: -9.287087811 + 1.5 = -7.787087811 x = -7.787087811 Simplifying x = -7.787087811

Solution

The solution to the problem is based on the solutions from the subproblems. x = {10.787087811, -7.787087811}

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