(7x-14)(4x+19)=180

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Solution for (7x-14)(4x+19)=180 equation:


Simplifying
(7x + -14)(4x + 19) = 180

Reorder the terms:
(-14 + 7x)(4x + 19) = 180

Reorder the terms:
(-14 + 7x)(19 + 4x) = 180

Multiply (-14 + 7x) * (19 + 4x)
(-14(19 + 4x) + 7x * (19 + 4x)) = 180
((19 * -14 + 4x * -14) + 7x * (19 + 4x)) = 180
((-266 + -56x) + 7x * (19 + 4x)) = 180
(-266 + -56x + (19 * 7x + 4x * 7x)) = 180
(-266 + -56x + (133x + 28x2)) = 180

Combine like terms: -56x + 133x = 77x
(-266 + 77x + 28x2) = 180

Solving
-266 + 77x + 28x2 = 180

Solving for variable 'x'.

Reorder the terms:
-266 + -180 + 77x + 28x2 = 180 + -180

Combine like terms: -266 + -180 = -446
-446 + 77x + 28x2 = 180 + -180

Combine like terms: 180 + -180 = 0
-446 + 77x + 28x2 = 0

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

Divide each side by '28'.
-15.92857143 + 2.75x + x2 = 0

Move the constant term to the right:

Add '15.92857143' to each side of the equation.
-15.92857143 + 2.75x + 15.92857143 + x2 = 0 + 15.92857143

Reorder the terms:
-15.92857143 + 15.92857143 + 2.75x + x2 = 0 + 15.92857143

Combine like terms: -15.92857143 + 15.92857143 = 0.00000000
0.00000000 + 2.75x + x2 = 0 + 15.92857143
2.75x + x2 = 0 + 15.92857143

Combine like terms: 0 + 15.92857143 = 15.92857143
2.75x + x2 = 15.92857143

The x term is 2.75x.  Take half its coefficient (1.375).
Square it (1.890625) and add it to both sides.

Add '1.890625' to each side of the equation.
2.75x + 1.890625 + x2 = 15.92857143 + 1.890625

Reorder the terms:
1.890625 + 2.75x + x2 = 15.92857143 + 1.890625

Combine like terms: 15.92857143 + 1.890625 = 17.81919643
1.890625 + 2.75x + x2 = 17.81919643

Factor a perfect square on the left side:
(x + 1.375)(x + 1.375) = 17.81919643

Calculate the square root of the right side: 4.221279004

Break this problem into two subproblems by setting 
(x + 1.375) equal to 4.221279004 and -4.221279004.

Subproblem 1

x + 1.375 = 4.221279004 Simplifying x + 1.375 = 4.221279004 Reorder the terms: 1.375 + x = 4.221279004 Solving 1.375 + x = 4.221279004 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.375' to each side of the equation. 1.375 + -1.375 + x = 4.221279004 + -1.375 Combine like terms: 1.375 + -1.375 = 0.000 0.000 + x = 4.221279004 + -1.375 x = 4.221279004 + -1.375 Combine like terms: 4.221279004 + -1.375 = 2.846279004 x = 2.846279004 Simplifying x = 2.846279004

Subproblem 2

x + 1.375 = -4.221279004 Simplifying x + 1.375 = -4.221279004 Reorder the terms: 1.375 + x = -4.221279004 Solving 1.375 + x = -4.221279004 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.375' to each side of the equation. 1.375 + -1.375 + x = -4.221279004 + -1.375 Combine like terms: 1.375 + -1.375 = 0.000 0.000 + x = -4.221279004 + -1.375 x = -4.221279004 + -1.375 Combine like terms: -4.221279004 + -1.375 = -5.596279004 x = -5.596279004 Simplifying x = -5.596279004

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.846279004, -5.596279004}

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