-2.67x^2+80.1x=534

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Solution for -2.67x^2+80.1x=534 equation:


Simplifying
-2.67x2 + 80.1x = 534

Reorder the terms:
80.1x + -2.67x2 = 534

Solving
80.1x + -2.67x2 = 534

Solving for variable 'x'.

Reorder the terms:
-534 + 80.1x + -2.67x2 = 534 + -534

Combine like terms: 534 + -534 = 0
-534 + 80.1x + -2.67x2 = 0

Begin completing the square.  Divide all terms by
-2.67 the coefficient of the squared term: 

Divide each side by '-2.67'.
200 + -30x + x2 = 0

Move the constant term to the right:

Add '-200' to each side of the equation.
200 + -30x + -200 + x2 = 0 + -200

Reorder the terms:
200 + -200 + -30x + x2 = 0 + -200

Combine like terms: 200 + -200 = 0
0 + -30x + x2 = 0 + -200
-30x + x2 = 0 + -200

Combine like terms: 0 + -200 = -200
-30x + x2 = -200

The x term is -30x.  Take half its coefficient (-15).
Square it (225) and add it to both sides.

Add '225' to each side of the equation.
-30x + 225 + x2 = -200 + 225

Reorder the terms:
225 + -30x + x2 = -200 + 225

Combine like terms: -200 + 225 = 25
225 + -30x + x2 = 25

Factor a perfect square on the left side:
(x + -15)(x + -15) = 25

Calculate the square root of the right side: 5

Break this problem into two subproblems by setting 
(x + -15) equal to 5 and -5.

Subproblem 1

x + -15 = 5 Simplifying x + -15 = 5 Reorder the terms: -15 + x = 5 Solving -15 + x = 5 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '15' to each side of the equation. -15 + 15 + x = 5 + 15 Combine like terms: -15 + 15 = 0 0 + x = 5 + 15 x = 5 + 15 Combine like terms: 5 + 15 = 20 x = 20 Simplifying x = 20

Subproblem 2

x + -15 = -5 Simplifying x + -15 = -5 Reorder the terms: -15 + x = -5 Solving -15 + x = -5 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '15' to each side of the equation. -15 + 15 + x = -5 + 15 Combine like terms: -15 + 15 = 0 0 + x = -5 + 15 x = -5 + 15 Combine like terms: -5 + 15 = 10 x = 10 Simplifying x = 10

Solution

The solution to the problem is based on the solutions from the subproblems. x = {20, 10}

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