(4x-13)(2x+35)=180

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Solution for (4x-13)(2x+35)=180 equation:


Simplifying
(4x + -13)(2x + 35) = 180

Reorder the terms:
(-13 + 4x)(2x + 35) = 180

Reorder the terms:
(-13 + 4x)(35 + 2x) = 180

Multiply (-13 + 4x) * (35 + 2x)
(-13(35 + 2x) + 4x * (35 + 2x)) = 180
((35 * -13 + 2x * -13) + 4x * (35 + 2x)) = 180
((-455 + -26x) + 4x * (35 + 2x)) = 180
(-455 + -26x + (35 * 4x + 2x * 4x)) = 180
(-455 + -26x + (140x + 8x2)) = 180

Combine like terms: -26x + 140x = 114x
(-455 + 114x + 8x2) = 180

Solving
-455 + 114x + 8x2 = 180

Solving for variable 'x'.

Reorder the terms:
-455 + -180 + 114x + 8x2 = 180 + -180

Combine like terms: -455 + -180 = -635
-635 + 114x + 8x2 = 180 + -180

Combine like terms: 180 + -180 = 0
-635 + 114x + 8x2 = 0

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

Divide each side by '8'.
-79.375 + 14.25x + x2 = 0

Move the constant term to the right:

Add '79.375' to each side of the equation.
-79.375 + 14.25x + 79.375 + x2 = 0 + 79.375

Reorder the terms:
-79.375 + 79.375 + 14.25x + x2 = 0 + 79.375

Combine like terms: -79.375 + 79.375 = 0.000
0.000 + 14.25x + x2 = 0 + 79.375
14.25x + x2 = 0 + 79.375

Combine like terms: 0 + 79.375 = 79.375
14.25x + x2 = 79.375

The x term is 14.25x.  Take half its coefficient (7.125).
Square it (50.765625) and add it to both sides.

Add '50.765625' to each side of the equation.
14.25x + 50.765625 + x2 = 79.375 + 50.765625

Reorder the terms:
50.765625 + 14.25x + x2 = 79.375 + 50.765625

Combine like terms: 79.375 + 50.765625 = 130.140625
50.765625 + 14.25x + x2 = 130.140625

Factor a perfect square on the left side:
(x + 7.125)(x + 7.125) = 130.140625

Calculate the square root of the right side: 11.407919398

Break this problem into two subproblems by setting 
(x + 7.125) equal to 11.407919398 and -11.407919398.

Subproblem 1

x + 7.125 = 11.407919398 Simplifying x + 7.125 = 11.407919398 Reorder the terms: 7.125 + x = 11.407919398 Solving 7.125 + x = 11.407919398 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-7.125' to each side of the equation. 7.125 + -7.125 + x = 11.407919398 + -7.125 Combine like terms: 7.125 + -7.125 = 0.000 0.000 + x = 11.407919398 + -7.125 x = 11.407919398 + -7.125 Combine like terms: 11.407919398 + -7.125 = 4.282919398 x = 4.282919398 Simplifying x = 4.282919398

Subproblem 2

x + 7.125 = -11.407919398 Simplifying x + 7.125 = -11.407919398 Reorder the terms: 7.125 + x = -11.407919398 Solving 7.125 + x = -11.407919398 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-7.125' to each side of the equation. 7.125 + -7.125 + x = -11.407919398 + -7.125 Combine like terms: 7.125 + -7.125 = 0.000 0.000 + x = -11.407919398 + -7.125 x = -11.407919398 + -7.125 Combine like terms: -11.407919398 + -7.125 = -18.532919398 x = -18.532919398 Simplifying x = -18.532919398

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.282919398, -18.532919398}

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