x^2-19x-71=0

Simple and best practice solution for x^2-19x-71=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 x^2-19x-71=0 equation:


Simplifying
x2 + -19x + -71 = 0

Reorder the terms:
-71 + -19x + x2 = 0

Solving
-71 + -19x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '71' to each side of the equation.
-71 + -19x + 71 + x2 = 0 + 71

Reorder the terms:
-71 + 71 + -19x + x2 = 0 + 71

Combine like terms: -71 + 71 = 0
0 + -19x + x2 = 0 + 71
-19x + x2 = 0 + 71

Combine like terms: 0 + 71 = 71
-19x + x2 = 71

The x term is -19x.  Take half its coefficient (-9.5).
Square it (90.25) and add it to both sides.

Add '90.25' to each side of the equation.
-19x + 90.25 + x2 = 71 + 90.25

Reorder the terms:
90.25 + -19x + x2 = 71 + 90.25

Combine like terms: 71 + 90.25 = 161.25
90.25 + -19x + x2 = 161.25

Factor a perfect square on the left side:
(x + -9.5)(x + -9.5) = 161.25

Calculate the square root of the right side: 12.698425099

Break this problem into two subproblems by setting 
(x + -9.5) equal to 12.698425099 and -12.698425099.

Subproblem 1

x + -9.5 = 12.698425099 Simplifying x + -9.5 = 12.698425099 Reorder the terms: -9.5 + x = 12.698425099 Solving -9.5 + x = 12.698425099 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '9.5' to each side of the equation. -9.5 + 9.5 + x = 12.698425099 + 9.5 Combine like terms: -9.5 + 9.5 = 0.0 0.0 + x = 12.698425099 + 9.5 x = 12.698425099 + 9.5 Combine like terms: 12.698425099 + 9.5 = 22.198425099 x = 22.198425099 Simplifying x = 22.198425099

Subproblem 2

x + -9.5 = -12.698425099 Simplifying x + -9.5 = -12.698425099 Reorder the terms: -9.5 + x = -12.698425099 Solving -9.5 + x = -12.698425099 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '9.5' to each side of the equation. -9.5 + 9.5 + x = -12.698425099 + 9.5 Combine like terms: -9.5 + 9.5 = 0.0 0.0 + x = -12.698425099 + 9.5 x = -12.698425099 + 9.5 Combine like terms: -12.698425099 + 9.5 = -3.198425099 x = -3.198425099 Simplifying x = -3.198425099

Solution

The solution to the problem is based on the solutions from the subproblems. x = {22.198425099, -3.198425099}

See similar equations:

| p^2-17p-39=0 | | w^3-2w^2-9w+9=6w+9 | | T/5=49 | | 2y+4+3+3x=0 | | .03(y-2)+.04y=.03y-.6 | | (0.3c+0.3)(c+0.7)= | | r^2+18r+72=0 | | 4h-10h=3h+25 | | 9v^2+1=10 | | 9.99+.35x=11.74 | | 4x+4+5x=9x+18 | | 0.66(1+n)=-0.5n | | 12+6x=6x+96 | | 2n^2+5=33 | | 9m^2=468 | | 2v^2+4v+12=0 | | 12x-40=30x+140 | | 2y+8=8y+2 | | 12+1.2= | | a/n=-26-5n | | y=40+24x+3x^2 | | 4(0.3)= | | -6p^2-17-5=0 | | 4x+1=-150 | | 2-6x=5-5(d-1) | | 4(3)+4(0.3)= | | 2(3x+4)=20-6x | | x+x+9.50+14+(-1x+-9.50)=81 | | 400+100c=550+70c | | 8x=10*(x-1) | | x+x+9.50+14+(-1x+-9.50)=83 | | -3=7(y-9/8) |

Equations solver categories