=-.01x^2+.7x+5.8

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Solution for =-.01x^2+.7x+5.8 equation:


Simplifying
0 = -0.01x2 + 0.7x + 5.8

Reorder the terms:
0 = 5.8 + 0.7x + -0.01x2

Solving
0 = 5.8 + 0.7x + -0.01x2

Solving for variable 'x'.

Combine like terms: 0 + -5.8 = -5.8
-5.8 + -0.7x + 0.01x2 = 5.8 + 0.7x + -0.01x2 + -5.8 + -0.7x + 0.01x2

Reorder the terms:
-5.8 + -0.7x + 0.01x2 = 5.8 + -5.8 + 0.7x + -0.7x + -0.01x2 + 0.01x2

Combine like terms: 5.8 + -5.8 = 0.0
-5.8 + -0.7x + 0.01x2 = 0.0 + 0.7x + -0.7x + -0.01x2 + 0.01x2
-5.8 + -0.7x + 0.01x2 = 0.7x + -0.7x + -0.01x2 + 0.01x2

Combine like terms: 0.7x + -0.7x = 0.0
-5.8 + -0.7x + 0.01x2 = 0.0 + -0.01x2 + 0.01x2
-5.8 + -0.7x + 0.01x2 = -0.01x2 + 0.01x2

Combine like terms: -0.01x2 + 0.01x2 = 0.00
-5.8 + -0.7x + 0.01x2 = 0.00

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

Divide each side by '0.01'.
-580 + -70x + x2 = 0

Move the constant term to the right:

Add '580' to each side of the equation.
-580 + -70x + 580 + x2 = 0 + 580

Reorder the terms:
-580 + 580 + -70x + x2 = 0 + 580

Combine like terms: -580 + 580 = 0
0 + -70x + x2 = 0 + 580
-70x + x2 = 0 + 580

Combine like terms: 0 + 580 = 580
-70x + x2 = 580

The x term is -70x.  Take half its coefficient (-35).
Square it (1225) and add it to both sides.

Add '1225' to each side of the equation.
-70x + 1225 + x2 = 580 + 1225

Reorder the terms:
1225 + -70x + x2 = 580 + 1225

Combine like terms: 580 + 1225 = 1805
1225 + -70x + x2 = 1805

Factor a perfect square on the left side:
(x + -35)(x + -35) = 1805

Calculate the square root of the right side: 42.485291572

Break this problem into two subproblems by setting 
(x + -35) equal to 42.485291572 and -42.485291572.

Subproblem 1

x + -35 = 42.485291572 Simplifying x + -35 = 42.485291572 Reorder the terms: -35 + x = 42.485291572 Solving -35 + x = 42.485291572 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '35' to each side of the equation. -35 + 35 + x = 42.485291572 + 35 Combine like terms: -35 + 35 = 0 0 + x = 42.485291572 + 35 x = 42.485291572 + 35 Combine like terms: 42.485291572 + 35 = 77.485291572 x = 77.485291572 Simplifying x = 77.485291572

Subproblem 2

x + -35 = -42.485291572 Simplifying x + -35 = -42.485291572 Reorder the terms: -35 + x = -42.485291572 Solving -35 + x = -42.485291572 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '35' to each side of the equation. -35 + 35 + x = -42.485291572 + 35 Combine like terms: -35 + 35 = 0 0 + x = -42.485291572 + 35 x = -42.485291572 + 35 Combine like terms: -42.485291572 + 35 = -7.485291572 x = -7.485291572 Simplifying x = -7.485291572

Solution

The solution to the problem is based on the solutions from the subproblems. x = {77.485291572, -7.485291572}

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