830x-x^2-(2300+70x)=0

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Solution for 830x-x^2-(2300+70x)=0 equation:


Simplifying
830x + -1x2 + -1(2300 + 70x) = 0
830x + -1x2 + (2300 * -1 + 70x * -1) = 0
830x + -1x2 + (-2300 + -70x) = 0

Reorder the terms:
-2300 + 830x + -70x + -1x2 = 0

Combine like terms: 830x + -70x = 760x
-2300 + 760x + -1x2 = 0

Solving
-2300 + 760x + -1x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
2300 + -760x + x2 = 0

Move the constant term to the right:

Add '-2300' to each side of the equation.
2300 + -760x + -2300 + x2 = 0 + -2300

Reorder the terms:
2300 + -2300 + -760x + x2 = 0 + -2300

Combine like terms: 2300 + -2300 = 0
0 + -760x + x2 = 0 + -2300
-760x + x2 = 0 + -2300

Combine like terms: 0 + -2300 = -2300
-760x + x2 = -2300

The x term is -760x.  Take half its coefficient (-380).
Square it (144400) and add it to both sides.

Add '144400' to each side of the equation.
-760x + 144400 + x2 = -2300 + 144400

Reorder the terms:
144400 + -760x + x2 = -2300 + 144400

Combine like terms: -2300 + 144400 = 142100
144400 + -760x + x2 = 142100

Factor a perfect square on the left side:
(x + -380)(x + -380) = 142100

Calculate the square root of the right side: 376.961536499

Break this problem into two subproblems by setting 
(x + -380) equal to 376.961536499 and -376.961536499.

Subproblem 1

x + -380 = 376.961536499 Simplifying x + -380 = 376.961536499 Reorder the terms: -380 + x = 376.961536499 Solving -380 + x = 376.961536499 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '380' to each side of the equation. -380 + 380 + x = 376.961536499 + 380 Combine like terms: -380 + 380 = 0 0 + x = 376.961536499 + 380 x = 376.961536499 + 380 Combine like terms: 376.961536499 + 380 = 756.961536499 x = 756.961536499 Simplifying x = 756.961536499

Subproblem 2

x + -380 = -376.961536499 Simplifying x + -380 = -376.961536499 Reorder the terms: -380 + x = -376.961536499 Solving -380 + x = -376.961536499 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '380' to each side of the equation. -380 + 380 + x = -376.961536499 + 380 Combine like terms: -380 + 380 = 0 0 + x = -376.961536499 + 380 x = -376.961536499 + 380 Combine like terms: -376.961536499 + 380 = 3.038463501 x = 3.038463501 Simplifying x = 3.038463501

Solution

The solution to the problem is based on the solutions from the subproblems. x = {756.961536499, 3.038463501}

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