2x^2+x-19=0

Simple and best practice solution for 2x^2+x-19=0 equation. Check how easy it is, and learn it for the future. Our solution is simple, and easy to understand, so don`t hesitate to use it as a solution of your homework.

If it's not what You are looking for type in the equation solver your own equation and let us solve it.

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


Simplifying
2x2 + x + -19 = 0

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

Solving
-19 + x + 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'.
-9.5 + 0.5x + x2 = 0

Move the constant term to the right:

Add '9.5' to each side of the equation.
-9.5 + 0.5x + 9.5 + x2 = 0 + 9.5

Reorder the terms:
-9.5 + 9.5 + 0.5x + x2 = 0 + 9.5

Combine like terms: -9.5 + 9.5 = 0.0
0.0 + 0.5x + x2 = 0 + 9.5
0.5x + x2 = 0 + 9.5

Combine like terms: 0 + 9.5 = 9.5
0.5x + x2 = 9.5

The x term is x.  Take half its coefficient (0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
0.5x + 0.25 + x2 = 9.5 + 0.25

Reorder the terms:
0.25 + 0.5x + x2 = 9.5 + 0.25

Combine like terms: 9.5 + 0.25 = 9.75
0.25 + 0.5x + x2 = 9.75

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = 9.75

Calculate the square root of the right side: 3.122498999

Break this problem into two subproblems by setting 
(x + 0.5) equal to 3.122498999 and -3.122498999.

Subproblem 1

x + 0.5 = 3.122498999 Simplifying x + 0.5 = 3.122498999 Reorder the terms: 0.5 + x = 3.122498999 Solving 0.5 + x = 3.122498999 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = 3.122498999 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 3.122498999 + -0.5 x = 3.122498999 + -0.5 Combine like terms: 3.122498999 + -0.5 = 2.622498999 x = 2.622498999 Simplifying x = 2.622498999

Subproblem 2

x + 0.5 = -3.122498999 Simplifying x + 0.5 = -3.122498999 Reorder the terms: 0.5 + x = -3.122498999 Solving 0.5 + x = -3.122498999 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = -3.122498999 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -3.122498999 + -0.5 x = -3.122498999 + -0.5 Combine like terms: -3.122498999 + -0.5 = -3.622498999 x = -3.622498999 Simplifying x = -3.622498999

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.622498999, -3.622498999}

See similar equations:

| 2+r=-3 | | 7x-(3+2x)=-30 | | 7y=33-y | | -3+h=-7 | | 7a(5a-4)-1=14-8a | | 2(0)+y=10(0)-1 | | 7x-(3+2)=-30 | | 2x+0=10x-1 | | [-7]+[-7]= | | xy=3x+y | | 6=5p-8 | | 0.4(x-12)=12(-4) | | 1.2s+3.69=14.37 | | 2+2*3=8 | | -5x^6-10x^5+175x^4= | | 4(2y-1)=-8(0.5)-y | | [-7]-[-7]= | | -2y+0=2y+8 | | -3.04=8(1.5-0.04) | | 6(d+13)=18(d-13) | | 6x+5-7x=10-4x+3 | | 23h+5=-4-1 | | 24.6+3a=38.16 | | -72=15c+3 | | x+8=6(x-2) | | Z^5=3125 | | 4(x-1)=45-3x | | 3(2x+7)=4x+41 | | 3(2x-1)=3+2(3x+4) | | 3(x+5)=23-x | | 5(x-5)+3=13 | | 10+5x=3x+6 |

Equations solver categories