2-.04x=70+2x-.02x^2

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Solution for 2-.04x=70+2x-.02x^2 equation:


Simplifying
2 + -0.04x = 70 + 2x + -0.02x2

Solving
2 + -0.04x = 70 + 2x + -0.02x2

Solving for variable 'x'.

Reorder the terms:
2 + -70 + -0.04x + -2x + 0.02x2 = 70 + 2x + -0.02x2 + -70 + -2x + 0.02x2

Combine like terms: 2 + -70 = -68
-68 + -0.04x + -2x + 0.02x2 = 70 + 2x + -0.02x2 + -70 + -2x + 0.02x2

Combine like terms: -0.04x + -2x = -2.04x
-68 + -2.04x + 0.02x2 = 70 + 2x + -0.02x2 + -70 + -2x + 0.02x2

Reorder the terms:
-68 + -2.04x + 0.02x2 = 70 + -70 + 2x + -2x + -0.02x2 + 0.02x2

Combine like terms: 70 + -70 = 0
-68 + -2.04x + 0.02x2 = 0 + 2x + -2x + -0.02x2 + 0.02x2
-68 + -2.04x + 0.02x2 = 2x + -2x + -0.02x2 + 0.02x2

Combine like terms: 2x + -2x = 0
-68 + -2.04x + 0.02x2 = 0 + -0.02x2 + 0.02x2
-68 + -2.04x + 0.02x2 = -0.02x2 + 0.02x2

Combine like terms: -0.02x2 + 0.02x2 = 0.00
-68 + -2.04x + 0.02x2 = 0.00

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

Divide each side by '0.02'.
-3400 + -102x + x2 = 0

Move the constant term to the right:

Add '3400' to each side of the equation.
-3400 + -102x + 3400 + x2 = 0 + 3400

Reorder the terms:
-3400 + 3400 + -102x + x2 = 0 + 3400

Combine like terms: -3400 + 3400 = 0
0 + -102x + x2 = 0 + 3400
-102x + x2 = 0 + 3400

Combine like terms: 0 + 3400 = 3400
-102x + x2 = 3400

The x term is -102x.  Take half its coefficient (-51).
Square it (2601) and add it to both sides.

Add '2601' to each side of the equation.
-102x + 2601 + x2 = 3400 + 2601

Reorder the terms:
2601 + -102x + x2 = 3400 + 2601

Combine like terms: 3400 + 2601 = 6001
2601 + -102x + x2 = 6001

Factor a perfect square on the left side:
(x + -51)(x + -51) = 6001

Calculate the square root of the right side: 77.466121627

Break this problem into two subproblems by setting 
(x + -51) equal to 77.466121627 and -77.466121627.

Subproblem 1

x + -51 = 77.466121627 Simplifying x + -51 = 77.466121627 Reorder the terms: -51 + x = 77.466121627 Solving -51 + x = 77.466121627 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '51' to each side of the equation. -51 + 51 + x = 77.466121627 + 51 Combine like terms: -51 + 51 = 0 0 + x = 77.466121627 + 51 x = 77.466121627 + 51 Combine like terms: 77.466121627 + 51 = 128.466121627 x = 128.466121627 Simplifying x = 128.466121627

Subproblem 2

x + -51 = -77.466121627 Simplifying x + -51 = -77.466121627 Reorder the terms: -51 + x = -77.466121627 Solving -51 + x = -77.466121627 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '51' to each side of the equation. -51 + 51 + x = -77.466121627 + 51 Combine like terms: -51 + 51 = 0 0 + x = -77.466121627 + 51 x = -77.466121627 + 51 Combine like terms: -77.466121627 + 51 = -26.466121627 x = -26.466121627 Simplifying x = -26.466121627

Solution

The solution to the problem is based on the solutions from the subproblems. x = {128.466121627, -26.466121627}

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