.07x+.09x(x-1500)=409

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Solution for .07x+.09x(x-1500)=409 equation:


Simplifying
0.07x + 0.09x(x + -1500) = 409

Reorder the terms:
0.07x + 0.09x(-1500 + x) = 409
0.07x + (-1500 * 0.09x + x * 0.09x) = 409
0.07x + (-135x + 0.09x2) = 409

Combine like terms: 0.07x + -135x = -134.93x
-134.93x + 0.09x2 = 409

Solving
-134.93x + 0.09x2 = 409

Solving for variable 'x'.

Reorder the terms:
-409 + -134.93x + 0.09x2 = 409 + -409

Combine like terms: 409 + -409 = 0
-409 + -134.93x + 0.09x2 = 0

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

Divide each side by '0.09'.
-4544.444444 + -1499.222222x + x2 = 0

Move the constant term to the right:

Add '4544.444444' to each side of the equation.
-4544.444444 + -1499.222222x + 4544.444444 + x2 = 0 + 4544.444444

Reorder the terms:
-4544.444444 + 4544.444444 + -1499.222222x + x2 = 0 + 4544.444444

Combine like terms: -4544.444444 + 4544.444444 = 0.000000
0.000000 + -1499.222222x + x2 = 0 + 4544.444444
-1499.222222x + x2 = 0 + 4544.444444

Combine like terms: 0 + 4544.444444 = 4544.444444
-1499.222222x + x2 = 4544.444444

The x term is -1499.222222x.  Take half its coefficient (-749.611111).
Square it (561916.8177) and add it to both sides.

Add '561916.8177' to each side of the equation.
-1499.222222x + 561916.8177 + x2 = 4544.444444 + 561916.8177

Reorder the terms:
561916.8177 + -1499.222222x + x2 = 4544.444444 + 561916.8177

Combine like terms: 4544.444444 + 561916.8177 = 566461.262144
561916.8177 + -1499.222222x + x2 = 566461.262144

Factor a perfect square on the left side:
(x + -749.611111)(x + -749.611111) = 566461.262144

Calculate the square root of the right side: 752.636208366

Break this problem into two subproblems by setting 
(x + -749.611111) equal to 752.636208366 and -752.636208366.

Subproblem 1

x + -749.611111 = 752.636208366 Simplifying x + -749.611111 = 752.636208366 Reorder the terms: -749.611111 + x = 752.636208366 Solving -749.611111 + x = 752.636208366 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '749.611111' to each side of the equation. -749.611111 + 749.611111 + x = 752.636208366 + 749.611111 Combine like terms: -749.611111 + 749.611111 = 0.000000 0.000000 + x = 752.636208366 + 749.611111 x = 752.636208366 + 749.611111 Combine like terms: 752.636208366 + 749.611111 = 1502.247319366 x = 1502.247319366 Simplifying x = 1502.247319366

Subproblem 2

x + -749.611111 = -752.636208366 Simplifying x + -749.611111 = -752.636208366 Reorder the terms: -749.611111 + x = -752.636208366 Solving -749.611111 + x = -752.636208366 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '749.611111' to each side of the equation. -749.611111 + 749.611111 + x = -752.636208366 + 749.611111 Combine like terms: -749.611111 + 749.611111 = 0.000000 0.000000 + x = -752.636208366 + 749.611111 x = -752.636208366 + 749.611111 Combine like terms: -752.636208366 + 749.611111 = -3.025097366 x = -3.025097366 Simplifying x = -3.025097366

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1502.247319366, -3.025097366}

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