2x^2-x-26=

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


Simplifying
2x2 + -1x + -26 = 0

Reorder the terms:
-26 + -1x + 2x2 = 0

Solving
-26 + -1x + 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'.
-13 + -0.5x + x2 = 0

Move the constant term to the right:

Add '13' to each side of the equation.
-13 + -0.5x + 13 + x2 = 0 + 13

Reorder the terms:
-13 + 13 + -0.5x + x2 = 0 + 13

Combine like terms: -13 + 13 = 0
0 + -0.5x + x2 = 0 + 13
-0.5x + x2 = 0 + 13

Combine like terms: 0 + 13 = 13
-0.5x + x2 = 13

The x term is -0.5x.  Take half its coefficient (-0.25).
Square it (0.0625) and add it to both sides.

Add '0.0625' to each side of the equation.
-0.5x + 0.0625 + x2 = 13 + 0.0625

Reorder the terms:
0.0625 + -0.5x + x2 = 13 + 0.0625

Combine like terms: 13 + 0.0625 = 13.0625
0.0625 + -0.5x + x2 = 13.0625

Factor a perfect square on the left side:
(x + -0.25)(x + -0.25) = 13.0625

Calculate the square root of the right side: 3.614208074

Break this problem into two subproblems by setting 
(x + -0.25) equal to 3.614208074 and -3.614208074.

Subproblem 1

x + -0.25 = 3.614208074 Simplifying x + -0.25 = 3.614208074 Reorder the terms: -0.25 + x = 3.614208074 Solving -0.25 + x = 3.614208074 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.25' to each side of the equation. -0.25 + 0.25 + x = 3.614208074 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.00 + x = 3.614208074 + 0.25 x = 3.614208074 + 0.25 Combine like terms: 3.614208074 + 0.25 = 3.864208074 x = 3.864208074 Simplifying x = 3.864208074

Subproblem 2

x + -0.25 = -3.614208074 Simplifying x + -0.25 = -3.614208074 Reorder the terms: -0.25 + x = -3.614208074 Solving -0.25 + x = -3.614208074 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.25' to each side of the equation. -0.25 + 0.25 + x = -3.614208074 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.00 + x = -3.614208074 + 0.25 x = -3.614208074 + 0.25 Combine like terms: -3.614208074 + 0.25 = -3.364208074 x = -3.364208074 Simplifying x = -3.364208074

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.864208074, -3.364208074}

See similar equations:

| -7x+4=3x | | 5.3(-3x)-20x= | | X^2-25=-5x | | 6(5+3n)=5(1+4n)+5 | | (4x+1)-3=26 | | 2x/3x+1=5 | | 420=x*6.5 | | 2.5b-3(-2b)= | | 22-4x=30-8x | | -5(p+3)=-6(2+p) | | -6*18=b | | 2x^2+5x+2=14 | | ln(x-2)+ln(2x-3)=2ln(x) | | -3[y-(2y+3)]+6y=-9 | | (5x+13)=-7 | | 3(k+4)=-6(3k+5) | | -2(5.1x-2.8y)= | | 8x-24=48+16 | | 27a^2+36a+12=0 | | 20+5x=3(-8x-3) | | x+(x+5)=35 | | 8.1(5x-3x)= | | 0.05(13-t)-0.2=0.08(30) | | 4a+3=5a-3 | | 5x+x=6 | | 134-4x=41x+19 | | 3x^2-x+10=0 | | 7-7x-5-5x=5 | | L-12=156 | | 8.3y=4.2y+143.5 | | 0=x^2-x-4 | | -9k=79 |

Equations solver categories