x^2-2x-71=0

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


Simplifying
x2 + -2x + -71 = 0

Reorder the terms:
-71 + -2x + x2 = 0

Solving
-71 + -2x + 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 + -2x + 71 + x2 = 0 + 71

Reorder the terms:
-71 + 71 + -2x + x2 = 0 + 71

Combine like terms: -71 + 71 = 0
0 + -2x + x2 = 0 + 71
-2x + x2 = 0 + 71

Combine like terms: 0 + 71 = 71
-2x + x2 = 71

The x term is -2x.  Take half its coefficient (-1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
-2x + 1 + x2 = 71 + 1

Reorder the terms:
1 + -2x + x2 = 71 + 1

Combine like terms: 71 + 1 = 72
1 + -2x + x2 = 72

Factor a perfect square on the left side:
(x + -1)(x + -1) = 72

Calculate the square root of the right side: 8.485281374

Break this problem into two subproblems by setting 
(x + -1) equal to 8.485281374 and -8.485281374.

Subproblem 1

x + -1 = 8.485281374 Simplifying x + -1 = 8.485281374 Reorder the terms: -1 + x = 8.485281374 Solving -1 + x = 8.485281374 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + x = 8.485281374 + 1 Combine like terms: -1 + 1 = 0 0 + x = 8.485281374 + 1 x = 8.485281374 + 1 Combine like terms: 8.485281374 + 1 = 9.485281374 x = 9.485281374 Simplifying x = 9.485281374

Subproblem 2

x + -1 = -8.485281374 Simplifying x + -1 = -8.485281374 Reorder the terms: -1 + x = -8.485281374 Solving -1 + x = -8.485281374 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + x = -8.485281374 + 1 Combine like terms: -1 + 1 = 0 0 + x = -8.485281374 + 1 x = -8.485281374 + 1 Combine like terms: -8.485281374 + 1 = -7.485281374 x = -7.485281374 Simplifying x = -7.485281374

Solution

The solution to the problem is based on the solutions from the subproblems. x = {9.485281374, -7.485281374}

See similar equations:

| 0=7x^2-3x-2 | | 4x+3x-x=18 | | 2x^4+14=209 | | 12y-2=18y+52 | | (2+j)(3+j)= | | 2x^4=195 | | m-5=m+10 | | 4x-6=4+2x | | 5x+7+4y=27 | | (2-j)+(3+j)-(4-j)= | | (130+w)(500+w)=3125 | | (130+w)(500+w)=0 | | x^2-6x+65=0 | | 2j-6j+4j= | | 8b^2-10b= | | -7x-8=-32-5x | | -4(4x-1)+9x=2(x+8) | | 2j+3j-3= | | 1.5x+y=500 | | 2/3(y=57)=178 | | 5x^2+5y^2=9 | | (4j+3)-(5j-6)= | | a+3+2a=-1+3m+4 | | 2a+3b=96 | | 25y=15y+25 | | -6(w-1)=3w+3-3(-3w-2) | | Y=36w^2-12w | | 6(w-1)=3w+3-3(-3w-2) | | (7-3j)-(9-6j)= | | 80x-10-47x+109= | | X^-1/5 | | 4+2q-2=0 |

Equations solver categories