4.9x^2+8x-450=0

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Solution for 4.9x^2+8x-450=0 equation:


Simplifying
4.9x2 + 8x + -450 = 0

Reorder the terms:
-450 + 8x + 4.9x2 = 0

Solving
-450 + 8x + 4.9x2 = 0

Solving for variable 'x'.

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

Divide each side by '4.9'.
-91.83673469 + 1.632653061x + x2 = 0

Move the constant term to the right:

Add '91.83673469' to each side of the equation.
-91.83673469 + 1.632653061x + 91.83673469 + x2 = 0 + 91.83673469

Reorder the terms:
-91.83673469 + 91.83673469 + 1.632653061x + x2 = 0 + 91.83673469

Combine like terms: -91.83673469 + 91.83673469 = 0.00000000
0.00000000 + 1.632653061x + x2 = 0 + 91.83673469
1.632653061x + x2 = 0 + 91.83673469

Combine like terms: 0 + 91.83673469 = 91.83673469
1.632653061x + x2 = 91.83673469

The x term is 1.632653061x.  Take half its coefficient (0.8163265305).
Square it (0.6663890044) and add it to both sides.

Add '0.6663890044' to each side of the equation.
1.632653061x + 0.6663890044 + x2 = 91.83673469 + 0.6663890044

Reorder the terms:
0.6663890044 + 1.632653061x + x2 = 91.83673469 + 0.6663890044

Combine like terms: 91.83673469 + 0.6663890044 = 92.5031236944
0.6663890044 + 1.632653061x + x2 = 92.5031236944

Factor a perfect square on the left side:
(x + 0.8163265305)(x + 0.8163265305) = 92.5031236944

Calculate the square root of the right side: 9.617854423

Break this problem into two subproblems by setting 
(x + 0.8163265305) equal to 9.617854423 and -9.617854423.

Subproblem 1

x + 0.8163265305 = 9.617854423 Simplifying x + 0.8163265305 = 9.617854423 Reorder the terms: 0.8163265305 + x = 9.617854423 Solving 0.8163265305 + x = 9.617854423 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.8163265305' to each side of the equation. 0.8163265305 + -0.8163265305 + x = 9.617854423 + -0.8163265305 Combine like terms: 0.8163265305 + -0.8163265305 = 0.0000000000 0.0000000000 + x = 9.617854423 + -0.8163265305 x = 9.617854423 + -0.8163265305 Combine like terms: 9.617854423 + -0.8163265305 = 8.8015278925 x = 8.8015278925 Simplifying x = 8.8015278925

Subproblem 2

x + 0.8163265305 = -9.617854423 Simplifying x + 0.8163265305 = -9.617854423 Reorder the terms: 0.8163265305 + x = -9.617854423 Solving 0.8163265305 + x = -9.617854423 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.8163265305' to each side of the equation. 0.8163265305 + -0.8163265305 + x = -9.617854423 + -0.8163265305 Combine like terms: 0.8163265305 + -0.8163265305 = 0.0000000000 0.0000000000 + x = -9.617854423 + -0.8163265305 x = -9.617854423 + -0.8163265305 Combine like terms: -9.617854423 + -0.8163265305 = -10.4341809535 x = -10.4341809535 Simplifying x = -10.4341809535

Solution

The solution to the problem is based on the solutions from the subproblems. x = {8.8015278925, -10.4341809535}

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