1177=.07x^2+47.4x+500

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Solution for 1177=.07x^2+47.4x+500 equation:


Simplifying
1177 = 0.07x2 + 47.4x + 500

Reorder the terms:
1177 = 500 + 47.4x + 0.07x2

Solving
1177 = 500 + 47.4x + 0.07x2

Solving for variable 'x'.

Combine like terms: 1177 + -500 = 677
677 + -47.4x + -0.07x2 = 500 + 47.4x + 0.07x2 + -500 + -47.4x + -0.07x2

Reorder the terms:
677 + -47.4x + -0.07x2 = 500 + -500 + 47.4x + -47.4x + 0.07x2 + -0.07x2

Combine like terms: 500 + -500 = 0
677 + -47.4x + -0.07x2 = 0 + 47.4x + -47.4x + 0.07x2 + -0.07x2
677 + -47.4x + -0.07x2 = 47.4x + -47.4x + 0.07x2 + -0.07x2

Combine like terms: 47.4x + -47.4x = 0.0
677 + -47.4x + -0.07x2 = 0.0 + 0.07x2 + -0.07x2
677 + -47.4x + -0.07x2 = 0.07x2 + -0.07x2

Combine like terms: 0.07x2 + -0.07x2 = 0.00
677 + -47.4x + -0.07x2 = 0.00

Begin completing the square.  Divide all terms by
-0.07 the coefficient of the squared term: 

Divide each side by '-0.07'.
-9671.428571 + 677.1428571x + x2 = 0

Move the constant term to the right:

Add '9671.428571' to each side of the equation.
-9671.428571 + 677.1428571x + 9671.428571 + x2 = 0 + 9671.428571

Reorder the terms:
-9671.428571 + 9671.428571 + 677.1428571x + x2 = 0 + 9671.428571

Combine like terms: -9671.428571 + 9671.428571 = 0.000000
0.000000 + 677.1428571x + x2 = 0 + 9671.428571
677.1428571x + x2 = 0 + 9671.428571

Combine like terms: 0 + 9671.428571 = 9671.428571
677.1428571x + x2 = 9671.428571

The x term is 677.1428571x.  Take half its coefficient (338.5714286).
Square it (114630.6123) and add it to both sides.

Add '114630.6123' to each side of the equation.
677.1428571x + 114630.6123 + x2 = 9671.428571 + 114630.6123

Reorder the terms:
114630.6123 + 677.1428571x + x2 = 9671.428571 + 114630.6123

Combine like terms: 9671.428571 + 114630.6123 = 124302.040871
114630.6123 + 677.1428571x + x2 = 124302.040871

Factor a perfect square on the left side:
(x + 338.5714286)(x + 338.5714286) = 124302.040871

Calculate the square root of the right side: 352.564945607

Break this problem into two subproblems by setting 
(x + 338.5714286) equal to 352.564945607 and -352.564945607.

Subproblem 1

x + 338.5714286 = 352.564945607 Simplifying x + 338.5714286 = 352.564945607 Reorder the terms: 338.5714286 + x = 352.564945607 Solving 338.5714286 + x = 352.564945607 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-338.5714286' to each side of the equation. 338.5714286 + -338.5714286 + x = 352.564945607 + -338.5714286 Combine like terms: 338.5714286 + -338.5714286 = 0.0000000 0.0000000 + x = 352.564945607 + -338.5714286 x = 352.564945607 + -338.5714286 Combine like terms: 352.564945607 + -338.5714286 = 13.993517007 x = 13.993517007 Simplifying x = 13.993517007

Subproblem 2

x + 338.5714286 = -352.564945607 Simplifying x + 338.5714286 = -352.564945607 Reorder the terms: 338.5714286 + x = -352.564945607 Solving 338.5714286 + x = -352.564945607 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-338.5714286' to each side of the equation. 338.5714286 + -338.5714286 + x = -352.564945607 + -338.5714286 Combine like terms: 338.5714286 + -338.5714286 = 0.0000000 0.0000000 + x = -352.564945607 + -338.5714286 x = -352.564945607 + -338.5714286 Combine like terms: -352.564945607 + -338.5714286 = -691.136374207 x = -691.136374207 Simplifying x = -691.136374207

Solution

The solution to the problem is based on the solutions from the subproblems. x = {13.993517007, -691.136374207}

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