4(3x-1)+(2x+3)(x-7)=

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Solution for 4(3x-1)+(2x+3)(x-7)= equation:


Simplifying
4(3x + -1) + (2x + 3)(x + -7) = 0

Reorder the terms:
4(-1 + 3x) + (2x + 3)(x + -7) = 0
(-1 * 4 + 3x * 4) + (2x + 3)(x + -7) = 0
(-4 + 12x) + (2x + 3)(x + -7) = 0

Reorder the terms:
-4 + 12x + (3 + 2x)(x + -7) = 0

Reorder the terms:
-4 + 12x + (3 + 2x)(-7 + x) = 0

Multiply (3 + 2x) * (-7 + x)
-4 + 12x + (3(-7 + x) + 2x * (-7 + x)) = 0
-4 + 12x + ((-7 * 3 + x * 3) + 2x * (-7 + x)) = 0
-4 + 12x + ((-21 + 3x) + 2x * (-7 + x)) = 0
-4 + 12x + (-21 + 3x + (-7 * 2x + x * 2x)) = 0
-4 + 12x + (-21 + 3x + (-14x + 2x2)) = 0

Combine like terms: 3x + -14x = -11x
-4 + 12x + (-21 + -11x + 2x2) = 0

Reorder the terms:
-4 + -21 + 12x + -11x + 2x2 = 0

Combine like terms: -4 + -21 = -25
-25 + 12x + -11x + 2x2 = 0

Combine like terms: 12x + -11x = 1x
-25 + 1x + 2x2 = 0

Solving
-25 + 1x + 2x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
2 the coefficient of the squared term: 

Divide each side by '2'.
-12.5 + 0.5x + x2 = 0

Move the constant term to the right:

Add '12.5' to each side of the equation.
-12.5 + 0.5x + 12.5 + x2 = 0 + 12.5

Reorder the terms:
-12.5 + 12.5 + 0.5x + x2 = 0 + 12.5

Combine like terms: -12.5 + 12.5 = 0.0
0.0 + 0.5x + x2 = 0 + 12.5
0.5x + x2 = 0 + 12.5

Combine like terms: 0 + 12.5 = 12.5
0.5x + x2 = 12.5

The x term is 0.5x.  Take half its coefficient (0.25).
Square it (0.0625) and add it to both sides.

Add '0.0625' to each side of the equation.
0.5x + 0.0625 + x2 = 12.5 + 0.0625

Reorder the terms:
0.0625 + 0.5x + x2 = 12.5 + 0.0625

Combine like terms: 12.5 + 0.0625 = 12.5625
0.0625 + 0.5x + x2 = 12.5625

Factor a perfect square on the left side:
(x + 0.25)(x + 0.25) = 12.5625

Calculate the square root of the right side: 3.54436172

Break this problem into two subproblems by setting 
(x + 0.25) equal to 3.54436172 and -3.54436172.

Subproblem 1

x + 0.25 = 3.54436172 Simplifying x + 0.25 = 3.54436172 Reorder the terms: 0.25 + x = 3.54436172 Solving 0.25 + x = 3.54436172 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.25' to each side of the equation. 0.25 + -0.25 + x = 3.54436172 + -0.25 Combine like terms: 0.25 + -0.25 = 0.00 0.00 + x = 3.54436172 + -0.25 x = 3.54436172 + -0.25 Combine like terms: 3.54436172 + -0.25 = 3.29436172 x = 3.29436172 Simplifying x = 3.29436172

Subproblem 2

x + 0.25 = -3.54436172 Simplifying x + 0.25 = -3.54436172 Reorder the terms: 0.25 + x = -3.54436172 Solving 0.25 + x = -3.54436172 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.25' to each side of the equation. 0.25 + -0.25 + x = -3.54436172 + -0.25 Combine like terms: 0.25 + -0.25 = 0.00 0.00 + x = -3.54436172 + -0.25 x = -3.54436172 + -0.25 Combine like terms: -3.54436172 + -0.25 = -3.79436172 x = -3.79436172 Simplifying x = -3.79436172

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.29436172, -3.79436172}

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