-5x^2+19x+12=0

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Solution for -5x^2+19x+12=0 equation:


Simplifying
-5x2 + 19x + 12 = 0

Reorder the terms:
12 + 19x + -5x2 = 0

Solving
12 + 19x + -5x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-5 the coefficient of the squared term: 

Divide each side by '-5'.
-2.4 + -3.8x + x2 = 0

Move the constant term to the right:

Add '2.4' to each side of the equation.
-2.4 + -3.8x + 2.4 + x2 = 0 + 2.4

Reorder the terms:
-2.4 + 2.4 + -3.8x + x2 = 0 + 2.4

Combine like terms: -2.4 + 2.4 = 0.0
0.0 + -3.8x + x2 = 0 + 2.4
-3.8x + x2 = 0 + 2.4

Combine like terms: 0 + 2.4 = 2.4
-3.8x + x2 = 2.4

The x term is -3.8x.  Take half its coefficient (-1.9).
Square it (3.61) and add it to both sides.

Add '3.61' to each side of the equation.
-3.8x + 3.61 + x2 = 2.4 + 3.61

Reorder the terms:
3.61 + -3.8x + x2 = 2.4 + 3.61

Combine like terms: 2.4 + 3.61 = 6.01
3.61 + -3.8x + x2 = 6.01

Factor a perfect square on the left side:
(x + -1.9)(x + -1.9) = 6.01

Calculate the square root of the right side: 2.451530134

Break this problem into two subproblems by setting 
(x + -1.9) equal to 2.451530134 and -2.451530134.

Subproblem 1

x + -1.9 = 2.451530134 Simplifying x + -1.9 = 2.451530134 Reorder the terms: -1.9 + x = 2.451530134 Solving -1.9 + x = 2.451530134 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.9' to each side of the equation. -1.9 + 1.9 + x = 2.451530134 + 1.9 Combine like terms: -1.9 + 1.9 = 0.0 0.0 + x = 2.451530134 + 1.9 x = 2.451530134 + 1.9 Combine like terms: 2.451530134 + 1.9 = 4.351530134 x = 4.351530134 Simplifying x = 4.351530134

Subproblem 2

x + -1.9 = -2.451530134 Simplifying x + -1.9 = -2.451530134 Reorder the terms: -1.9 + x = -2.451530134 Solving -1.9 + x = -2.451530134 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.9' to each side of the equation. -1.9 + 1.9 + x = -2.451530134 + 1.9 Combine like terms: -1.9 + 1.9 = 0.0 0.0 + x = -2.451530134 + 1.9 x = -2.451530134 + 1.9 Combine like terms: -2.451530134 + 1.9 = -0.551530134 x = -0.551530134 Simplifying x = -0.551530134

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.351530134, -0.551530134}

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