x^2-x-26=0

Simple and best practice solution for x^2-x-26=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-x-26=0 equation:


Simplifying
x2 + -1x + -26 = 0

Reorder the terms:
-26 + -1x + x2 = 0

Solving
-26 + -1x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '26' to each side of the equation.
-26 + -1x + 26 + x2 = 0 + 26

Reorder the terms:
-26 + 26 + -1x + x2 = 0 + 26

Combine like terms: -26 + 26 = 0
0 + -1x + x2 = 0 + 26
-1x + x2 = 0 + 26

Combine like terms: 0 + 26 = 26
-1x + x2 = 26

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 = 26 + 0.25

Reorder the terms:
0.25 + -1x + x2 = 26 + 0.25

Combine like terms: 26 + 0.25 = 26.25
0.25 + -1x + x2 = 26.25

Factor a perfect square on the left side:
(x + -0.5)(x + -0.5) = 26.25

Calculate the square root of the right side: 5.123475383

Break this problem into two subproblems by setting 
(x + -0.5) equal to 5.123475383 and -5.123475383.

Subproblem 1

x + -0.5 = 5.123475383 Simplifying x + -0.5 = 5.123475383 Reorder the terms: -0.5 + x = 5.123475383 Solving -0.5 + x = 5.123475383 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 = 5.123475383 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + x = 5.123475383 + 0.5 x = 5.123475383 + 0.5 Combine like terms: 5.123475383 + 0.5 = 5.623475383 x = 5.623475383 Simplifying x = 5.623475383

Subproblem 2

x + -0.5 = -5.123475383 Simplifying x + -0.5 = -5.123475383 Reorder the terms: -0.5 + x = -5.123475383 Solving -0.5 + x = -5.123475383 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 = -5.123475383 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + x = -5.123475383 + 0.5 x = -5.123475383 + 0.5 Combine like terms: -5.123475383 + 0.5 = -4.623475383 x = -4.623475383 Simplifying x = -4.623475383

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.623475383, -4.623475383}

See similar equations:

| 55+4y-18=14y-12-3y | | x^2+y^2-8x+10y-4=s | | 14-6(a+2)=9+a | | x^2+11x-182=0 | | x^2+11x-20=0 | | w^2-6w-13=0 | | x^2+11-20=0 | | 10x+6(6-y)=2y+12 | | 10x+6(6-y)=2y-1 | | -2(2x-1)=3 | | -3y+4=-4y+6 | | 8x+15-7x=-2-12 | | 13x-5=7+11x | | 75=3(-6g-5) | | 2x^2+6x-182=0 | | -3(4c-8)=-36 | | 5(3x-1)=3(3x+1) | | -12=2+5g+2g | | 12+2(z-6)=-3z+2 | | .125y=-7 | | x=4x+6+6x-34 | | -3.7x-1=-3.5x+6 | | -2(5s-5)-10=-3(7s+1)-4 | | (5x)+(2x+5)=180 | | (5x)(2x+5)=180 | | -2(5s-5)-10=-3(8s+0)-5 | | x^2+6x-182=0 | | 3.6=3(1.1y+1.8) | | x^2+6x-172=0 | | BC=9.5x+25.5 | | 5+2(n+2)=5n | | 0=3x^3-11x^2+4x |

Equations solver categories