19x-2x^2+30=0

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Solution for 19x-2x^2+30=0 equation:


Simplifying
19x + -2x2 + 30 = 0

Reorder the terms:
30 + 19x + -2x2 = 0

Solving
30 + 19x + -2x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-2 the coefficient of the squared term: 

Divide each side by '-2'.
-15 + -9.5x + x2 = 0

Move the constant term to the right:

Add '15' to each side of the equation.
-15 + -9.5x + 15 + x2 = 0 + 15

Reorder the terms:
-15 + 15 + -9.5x + x2 = 0 + 15

Combine like terms: -15 + 15 = 0
0 + -9.5x + x2 = 0 + 15
-9.5x + x2 = 0 + 15

Combine like terms: 0 + 15 = 15
-9.5x + x2 = 15

The x term is -9.5x.  Take half its coefficient (-4.75).
Square it (22.5625) and add it to both sides.

Add '22.5625' to each side of the equation.
-9.5x + 22.5625 + x2 = 15 + 22.5625

Reorder the terms:
22.5625 + -9.5x + x2 = 15 + 22.5625

Combine like terms: 15 + 22.5625 = 37.5625
22.5625 + -9.5x + x2 = 37.5625

Factor a perfect square on the left side:
(x + -4.75)(x + -4.75) = 37.5625

Calculate the square root of the right side: 6.128825336

Break this problem into two subproblems by setting 
(x + -4.75) equal to 6.128825336 and -6.128825336.

Subproblem 1

x + -4.75 = 6.128825336 Simplifying x + -4.75 = 6.128825336 Reorder the terms: -4.75 + x = 6.128825336 Solving -4.75 + x = 6.128825336 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.75' to each side of the equation. -4.75 + 4.75 + x = 6.128825336 + 4.75 Combine like terms: -4.75 + 4.75 = 0.00 0.00 + x = 6.128825336 + 4.75 x = 6.128825336 + 4.75 Combine like terms: 6.128825336 + 4.75 = 10.878825336 x = 10.878825336 Simplifying x = 10.878825336

Subproblem 2

x + -4.75 = -6.128825336 Simplifying x + -4.75 = -6.128825336 Reorder the terms: -4.75 + x = -6.128825336 Solving -4.75 + x = -6.128825336 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.75' to each side of the equation. -4.75 + 4.75 + x = -6.128825336 + 4.75 Combine like terms: -4.75 + 4.75 = 0.00 0.00 + x = -6.128825336 + 4.75 x = -6.128825336 + 4.75 Combine like terms: -6.128825336 + 4.75 = -1.378825336 x = -1.378825336 Simplifying x = -1.378825336

Solution

The solution to the problem is based on the solutions from the subproblems. x = {10.878825336, -1.378825336}

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