(4x+5)(2x+17)=180

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Solution for (4x+5)(2x+17)=180 equation:


Simplifying
(4x + 5)(2x + 17) = 180

Reorder the terms:
(5 + 4x)(2x + 17) = 180

Reorder the terms:
(5 + 4x)(17 + 2x) = 180

Multiply (5 + 4x) * (17 + 2x)
(5(17 + 2x) + 4x * (17 + 2x)) = 180
((17 * 5 + 2x * 5) + 4x * (17 + 2x)) = 180
((85 + 10x) + 4x * (17 + 2x)) = 180
(85 + 10x + (17 * 4x + 2x * 4x)) = 180
(85 + 10x + (68x + 8x2)) = 180

Combine like terms: 10x + 68x = 78x
(85 + 78x + 8x2) = 180

Solving
85 + 78x + 8x2 = 180

Solving for variable 'x'.

Reorder the terms:
85 + -180 + 78x + 8x2 = 180 + -180

Combine like terms: 85 + -180 = -95
-95 + 78x + 8x2 = 180 + -180

Combine like terms: 180 + -180 = 0
-95 + 78x + 8x2 = 0

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

Divide each side by '8'.
-11.875 + 9.75x + x2 = 0

Move the constant term to the right:

Add '11.875' to each side of the equation.
-11.875 + 9.75x + 11.875 + x2 = 0 + 11.875

Reorder the terms:
-11.875 + 11.875 + 9.75x + x2 = 0 + 11.875

Combine like terms: -11.875 + 11.875 = 0.000
0.000 + 9.75x + x2 = 0 + 11.875
9.75x + x2 = 0 + 11.875

Combine like terms: 0 + 11.875 = 11.875
9.75x + x2 = 11.875

The x term is 9.75x.  Take half its coefficient (4.875).
Square it (23.765625) and add it to both sides.

Add '23.765625' to each side of the equation.
9.75x + 23.765625 + x2 = 11.875 + 23.765625

Reorder the terms:
23.765625 + 9.75x + x2 = 11.875 + 23.765625

Combine like terms: 11.875 + 23.765625 = 35.640625
23.765625 + 9.75x + x2 = 35.640625

Factor a perfect square on the left side:
(x + 4.875)(x + 4.875) = 35.640625

Calculate the square root of the right side: 5.969976968

Break this problem into two subproblems by setting 
(x + 4.875) equal to 5.969976968 and -5.969976968.

Subproblem 1

x + 4.875 = 5.969976968 Simplifying x + 4.875 = 5.969976968 Reorder the terms: 4.875 + x = 5.969976968 Solving 4.875 + x = 5.969976968 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4.875' to each side of the equation. 4.875 + -4.875 + x = 5.969976968 + -4.875 Combine like terms: 4.875 + -4.875 = 0.000 0.000 + x = 5.969976968 + -4.875 x = 5.969976968 + -4.875 Combine like terms: 5.969976968 + -4.875 = 1.094976968 x = 1.094976968 Simplifying x = 1.094976968

Subproblem 2

x + 4.875 = -5.969976968 Simplifying x + 4.875 = -5.969976968 Reorder the terms: 4.875 + x = -5.969976968 Solving 4.875 + x = -5.969976968 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4.875' to each side of the equation. 4.875 + -4.875 + x = -5.969976968 + -4.875 Combine like terms: 4.875 + -4.875 = 0.000 0.000 + x = -5.969976968 + -4.875 x = -5.969976968 + -4.875 Combine like terms: -5.969976968 + -4.875 = -10.844976968 x = -10.844976968 Simplifying x = -10.844976968

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.094976968, -10.844976968}

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