-.05x^2+1.75x+22.5=0

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Solution for -.05x^2+1.75x+22.5=0 equation:


Simplifying
-0.05x2 + 1.75x + 22.5 = 0

Reorder the terms:
22.5 + 1.75x + -0.05x2 = 0

Solving
22.5 + 1.75x + -0.05x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-0.05 the coefficient of the squared term: 

Divide each side by '-0.05'.
-450 + -35x + x2 = 0

Move the constant term to the right:

Add '450' to each side of the equation.
-450 + -35x + 450 + x2 = 0 + 450

Reorder the terms:
-450 + 450 + -35x + x2 = 0 + 450

Combine like terms: -450 + 450 = 0
0 + -35x + x2 = 0 + 450
-35x + x2 = 0 + 450

Combine like terms: 0 + 450 = 450
-35x + x2 = 450

The x term is -35x.  Take half its coefficient (-17.5).
Square it (306.25) and add it to both sides.

Add '306.25' to each side of the equation.
-35x + 306.25 + x2 = 450 + 306.25

Reorder the terms:
306.25 + -35x + x2 = 450 + 306.25

Combine like terms: 450 + 306.25 = 756.25
306.25 + -35x + x2 = 756.25

Factor a perfect square on the left side:
(x + -17.5)(x + -17.5) = 756.25

Calculate the square root of the right side: 27.5

Break this problem into two subproblems by setting 
(x + -17.5) equal to 27.5 and -27.5.

Subproblem 1

x + -17.5 = 27.5 Simplifying x + -17.5 = 27.5 Reorder the terms: -17.5 + x = 27.5 Solving -17.5 + x = 27.5 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '17.5' to each side of the equation. -17.5 + 17.5 + x = 27.5 + 17.5 Combine like terms: -17.5 + 17.5 = 0.0 0.0 + x = 27.5 + 17.5 x = 27.5 + 17.5 Combine like terms: 27.5 + 17.5 = 45 x = 45 Simplifying x = 45

Subproblem 2

x + -17.5 = -27.5 Simplifying x + -17.5 = -27.5 Reorder the terms: -17.5 + x = -27.5 Solving -17.5 + x = -27.5 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '17.5' to each side of the equation. -17.5 + 17.5 + x = -27.5 + 17.5 Combine like terms: -17.5 + 17.5 = 0.0 0.0 + x = -27.5 + 17.5 x = -27.5 + 17.5 Combine like terms: -27.5 + 17.5 = -10 x = -10 Simplifying x = -10

Solution

The solution to the problem is based on the solutions from the subproblems. x = {45, -10}

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