1440=3x+5x(410-x)

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Solution for 1440=3x+5x(410-x) equation:


Simplifying
1440 = 3x + 5x(410 + -1x)
1440 = 3x + (410 * 5x + -1x * 5x)
1440 = 3x + (2050x + -5x2)

Combine like terms: 3x + 2050x = 2053x
1440 = 2053x + -5x2

Solving
1440 = 2053x + -5x2

Solving for variable 'x'.

Reorder the terms:
1440 + -2053x + 5x2 = 2053x + -2053x + -5x2 + 5x2

Combine like terms: 2053x + -2053x = 0
1440 + -2053x + 5x2 = 0 + -5x2 + 5x2
1440 + -2053x + 5x2 = -5x2 + 5x2

Combine like terms: -5x2 + 5x2 = 0
1440 + -2053x + 5x2 = 0

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

Divide each side by '5'.
288 + -410.6x + x2 = 0

Move the constant term to the right:

Add '-288' to each side of the equation.
288 + -410.6x + -288 + x2 = 0 + -288

Reorder the terms:
288 + -288 + -410.6x + x2 = 0 + -288

Combine like terms: 288 + -288 = 0
0 + -410.6x + x2 = 0 + -288
-410.6x + x2 = 0 + -288

Combine like terms: 0 + -288 = -288
-410.6x + x2 = -288

The x term is -410.6x.  Take half its coefficient (-205.3).
Square it (42148.09) and add it to both sides.

Add '42148.09' to each side of the equation.
-410.6x + 42148.09 + x2 = -288 + 42148.09

Reorder the terms:
42148.09 + -410.6x + x2 = -288 + 42148.09

Combine like terms: -288 + 42148.09 = 41860.09
42148.09 + -410.6x + x2 = 41860.09

Factor a perfect square on the left side:
(x + -205.3)(x + -205.3) = 41860.09

Calculate the square root of the right side: 204.597385125

Break this problem into two subproblems by setting 
(x + -205.3) equal to 204.597385125 and -204.597385125.

Subproblem 1

x + -205.3 = 204.597385125 Simplifying x + -205.3 = 204.597385125 Reorder the terms: -205.3 + x = 204.597385125 Solving -205.3 + x = 204.597385125 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '205.3' to each side of the equation. -205.3 + 205.3 + x = 204.597385125 + 205.3 Combine like terms: -205.3 + 205.3 = 0.0 0.0 + x = 204.597385125 + 205.3 x = 204.597385125 + 205.3 Combine like terms: 204.597385125 + 205.3 = 409.897385125 x = 409.897385125 Simplifying x = 409.897385125

Subproblem 2

x + -205.3 = -204.597385125 Simplifying x + -205.3 = -204.597385125 Reorder the terms: -205.3 + x = -204.597385125 Solving -205.3 + x = -204.597385125 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '205.3' to each side of the equation. -205.3 + 205.3 + x = -204.597385125 + 205.3 Combine like terms: -205.3 + 205.3 = 0.0 0.0 + x = -204.597385125 + 205.3 x = -204.597385125 + 205.3 Combine like terms: -204.597385125 + 205.3 = 0.702614875 x = 0.702614875 Simplifying x = 0.702614875

Solution

The solution to the problem is based on the solutions from the subproblems. x = {409.897385125, 0.702614875}

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