-1.50x^2+84x-450=0

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Solution for -1.50x^2+84x-450=0 equation:


Simplifying
-1.50x2 + 84x + -450 = 0

Reorder the terms:
-450 + 84x + -1.50x2 = 0

Solving
-450 + 84x + -1.50x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-1.50 the coefficient of the squared term: 

Divide each side by '-1.50'.
300 + -56x + x2 = 0

Move the constant term to the right:

Add '-300' to each side of the equation.
300 + -56x + -300 + x2 = 0 + -300

Reorder the terms:
300 + -300 + -56x + x2 = 0 + -300

Combine like terms: 300 + -300 = 0
0 + -56x + x2 = 0 + -300
-56x + x2 = 0 + -300

Combine like terms: 0 + -300 = -300
-56x + x2 = -300

The x term is -56x.  Take half its coefficient (-28).
Square it (784) and add it to both sides.

Add '784' to each side of the equation.
-56x + 784 + x2 = -300 + 784

Reorder the terms:
784 + -56x + x2 = -300 + 784

Combine like terms: -300 + 784 = 484
784 + -56x + x2 = 484

Factor a perfect square on the left side:
(x + -28)(x + -28) = 484

Calculate the square root of the right side: 22

Break this problem into two subproblems by setting 
(x + -28) equal to 22 and -22.

Subproblem 1

x + -28 = 22 Simplifying x + -28 = 22 Reorder the terms: -28 + x = 22 Solving -28 + x = 22 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '28' to each side of the equation. -28 + 28 + x = 22 + 28 Combine like terms: -28 + 28 = 0 0 + x = 22 + 28 x = 22 + 28 Combine like terms: 22 + 28 = 50 x = 50 Simplifying x = 50

Subproblem 2

x + -28 = -22 Simplifying x + -28 = -22 Reorder the terms: -28 + x = -22 Solving -28 + x = -22 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '28' to each side of the equation. -28 + 28 + x = -22 + 28 Combine like terms: -28 + 28 = 0 0 + x = -22 + 28 x = -22 + 28 Combine like terms: -22 + 28 = 6 x = 6 Simplifying x = 6

Solution

The solution to the problem is based on the solutions from the subproblems. x = {50, 6}

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