x^2-x-19=

Simple and best practice solution for x^2-x-19= 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 x^2-x-19= equation:


Simplifying
x2 + -1x + -19 = 0

Reorder the terms:
-19 + -1x + x2 = 0

Solving
-19 + -1x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '19' to each side of the equation.
-19 + -1x + 19 + x2 = 0 + 19

Reorder the terms:
-19 + 19 + -1x + x2 = 0 + 19

Combine like terms: -19 + 19 = 0
0 + -1x + x2 = 0 + 19
-1x + x2 = 0 + 19

Combine like terms: 0 + 19 = 19
-1x + x2 = 19

The x term is -1x.  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.
-1x + 0.25 + x2 = 19 + 0.25

Reorder the terms:
0.25 + -1x + x2 = 19 + 0.25

Combine like terms: 19 + 0.25 = 19.25
0.25 + -1x + x2 = 19.25

Factor a perfect square on the left side:
(x + -0.5)(x + -0.5) = 19.25

Calculate the square root of the right side: 4.387482194

Break this problem into two subproblems by setting 
(x + -0.5) equal to 4.387482194 and -4.387482194.

Subproblem 1

x + -0.5 = 4.387482194 Simplifying x + -0.5 = 4.387482194 Reorder the terms: -0.5 + x = 4.387482194 Solving -0.5 + x = 4.387482194 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 = 4.387482194 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + x = 4.387482194 + 0.5 x = 4.387482194 + 0.5 Combine like terms: 4.387482194 + 0.5 = 4.887482194 x = 4.887482194 Simplifying x = 4.887482194

Subproblem 2

x + -0.5 = -4.387482194 Simplifying x + -0.5 = -4.387482194 Reorder the terms: -0.5 + x = -4.387482194 Solving -0.5 + x = -4.387482194 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 = -4.387482194 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + x = -4.387482194 + 0.5 x = -4.387482194 + 0.5 Combine like terms: -4.387482194 + 0.5 = -3.887482194 x = -3.887482194 Simplifying x = -3.887482194

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.887482194, -3.887482194}

See similar equations:

| 4x^5+0x^4-15x^3+5x^2+15x-9=0 | | x^2+18x+81=36 | | 4x+7=2x+25 | | 9-8-5x=12 | | 3c+5t+2y=8.90 | | x-6(x+2)=-12 | | 6-7x=72-21x | | t+10=c | | 6x+26=15x-46 | | -4x-12=6x-8 | | Ix+3I-9=2x | | 14x^2-6x= | | 0.20x-0.10x=1.80 | | 5-3(1-2x)=3x-13 | | x+8x+2x=6-5 | | 2p-5q=1 | | 5x+11x=85+x | | f=-5f+36 | | 3y(2y-5)-(3y-2)(4y+4)= | | n-15=24 | | 5x+20=15x-90 | | -9=3n | | y=4x^2+16x+36 | | 3(x+8)=x+4 | | 25+4(3x-8)-2(x+6)=x-9 | | 7x^2+13x=2 | | 15g=90 | | x+x-4x+4=0 | | 4*x=2 | | 11x-5x=18 | | 8-12x=6(1+x) | | 3x-4y-6=0 |

Equations solver categories