457=0.35x^2-32.9x+975

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Solution for 457=0.35x^2-32.9x+975 equation:


Simplifying
457 = 0.35x2 + -32.9x + 975

Reorder the terms:
457 = 975 + -32.9x + 0.35x2

Solving
457 = 975 + -32.9x + 0.35x2

Solving for variable 'x'.

Combine like terms: 457 + -975 = -518
-518 + 32.9x + -0.35x2 = 975 + -32.9x + 0.35x2 + -975 + 32.9x + -0.35x2

Reorder the terms:
-518 + 32.9x + -0.35x2 = 975 + -975 + -32.9x + 32.9x + 0.35x2 + -0.35x2

Combine like terms: 975 + -975 = 0
-518 + 32.9x + -0.35x2 = 0 + -32.9x + 32.9x + 0.35x2 + -0.35x2
-518 + 32.9x + -0.35x2 = -32.9x + 32.9x + 0.35x2 + -0.35x2

Combine like terms: -32.9x + 32.9x = 0.0
-518 + 32.9x + -0.35x2 = 0.0 + 0.35x2 + -0.35x2
-518 + 32.9x + -0.35x2 = 0.35x2 + -0.35x2

Combine like terms: 0.35x2 + -0.35x2 = 0.00
-518 + 32.9x + -0.35x2 = 0.00

Begin completing the square.  Divide all terms by
-0.35 the coefficient of the squared term: 

Divide each side by '-0.35'.
1480 + -94x + x2 = 0

Move the constant term to the right:

Add '-1480' to each side of the equation.
1480 + -94x + -1480 + x2 = 0 + -1480

Reorder the terms:
1480 + -1480 + -94x + x2 = 0 + -1480

Combine like terms: 1480 + -1480 = 0
0 + -94x + x2 = 0 + -1480
-94x + x2 = 0 + -1480

Combine like terms: 0 + -1480 = -1480
-94x + x2 = -1480

The x term is -94x.  Take half its coefficient (-47).
Square it (2209) and add it to both sides.

Add '2209' to each side of the equation.
-94x + 2209 + x2 = -1480 + 2209

Reorder the terms:
2209 + -94x + x2 = -1480 + 2209

Combine like terms: -1480 + 2209 = 729
2209 + -94x + x2 = 729

Factor a perfect square on the left side:
(x + -47)(x + -47) = 729

Calculate the square root of the right side: 27

Break this problem into two subproblems by setting 
(x + -47) equal to 27 and -27.

Subproblem 1

x + -47 = 27 Simplifying x + -47 = 27 Reorder the terms: -47 + x = 27 Solving -47 + x = 27 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '47' to each side of the equation. -47 + 47 + x = 27 + 47 Combine like terms: -47 + 47 = 0 0 + x = 27 + 47 x = 27 + 47 Combine like terms: 27 + 47 = 74 x = 74 Simplifying x = 74

Subproblem 2

x + -47 = -27 Simplifying x + -47 = -27 Reorder the terms: -47 + x = -27 Solving -47 + x = -27 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '47' to each side of the equation. -47 + 47 + x = -27 + 47 Combine like terms: -47 + 47 = 0 0 + x = -27 + 47 x = -27 + 47 Combine like terms: -27 + 47 = 20 x = 20 Simplifying x = 20

Solution

The solution to the problem is based on the solutions from the subproblems. x = {74, 20}

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