2x^2-5x-125=0

Simple and best practice solution for 2x^2-5x-125=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 2x^2-5x-125=0 equation:


Simplifying
2x2 + -5x + -125 = 0

Reorder the terms:
-125 + -5x + 2x2 = 0

Solving
-125 + -5x + 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'.
-62.5 + -2.5x + x2 = 0

Move the constant term to the right:

Add '62.5' to each side of the equation.
-62.5 + -2.5x + 62.5 + x2 = 0 + 62.5

Reorder the terms:
-62.5 + 62.5 + -2.5x + x2 = 0 + 62.5

Combine like terms: -62.5 + 62.5 = 0.0
0.0 + -2.5x + x2 = 0 + 62.5
-2.5x + x2 = 0 + 62.5

Combine like terms: 0 + 62.5 = 62.5
-2.5x + x2 = 62.5

The x term is -2.5x.  Take half its coefficient (-1.25).
Square it (1.5625) and add it to both sides.

Add '1.5625' to each side of the equation.
-2.5x + 1.5625 + x2 = 62.5 + 1.5625

Reorder the terms:
1.5625 + -2.5x + x2 = 62.5 + 1.5625

Combine like terms: 62.5 + 1.5625 = 64.0625
1.5625 + -2.5x + x2 = 64.0625

Factor a perfect square on the left side:
(x + -1.25)(x + -1.25) = 64.0625

Calculate the square root of the right side: 8.003905297

Break this problem into two subproblems by setting 
(x + -1.25) equal to 8.003905297 and -8.003905297.

Subproblem 1

x + -1.25 = 8.003905297 Simplifying x + -1.25 = 8.003905297 Reorder the terms: -1.25 + x = 8.003905297 Solving -1.25 + x = 8.003905297 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.25' to each side of the equation. -1.25 + 1.25 + x = 8.003905297 + 1.25 Combine like terms: -1.25 + 1.25 = 0.00 0.00 + x = 8.003905297 + 1.25 x = 8.003905297 + 1.25 Combine like terms: 8.003905297 + 1.25 = 9.253905297 x = 9.253905297 Simplifying x = 9.253905297

Subproblem 2

x + -1.25 = -8.003905297 Simplifying x + -1.25 = -8.003905297 Reorder the terms: -1.25 + x = -8.003905297 Solving -1.25 + x = -8.003905297 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.25' to each side of the equation. -1.25 + 1.25 + x = -8.003905297 + 1.25 Combine like terms: -1.25 + 1.25 = 0.00 0.00 + x = -8.003905297 + 1.25 x = -8.003905297 + 1.25 Combine like terms: -8.003905297 + 1.25 = -6.753905297 x = -6.753905297 Simplifying x = -6.753905297

Solution

The solution to the problem is based on the solutions from the subproblems. x = {9.253905297, -6.753905297}

See similar equations:

| 3x^2-2x+18=y | | 3x^2-2x-18=y | | 3x^2-2x+18=0 | | 11=20-k*3 | | (21x-3)+(7x+9)+(15x+15)=180 | | T^2-2t+10=0 | | (2m+3)(m^2-2m+1)= | | 2x+34=-4(x+5) | | b-7/3=-9/4 | | 2x-4=2(x/1) | | (8x^4)(4x^3)/7x^2 | | G=5/8mnp | | 12+x+4+6x=8x-8+5x | | t^2+2t+10=0 | | 4x-3=2(2x-3) | | 3-18z=-17z+19 | | -12=-2/w | | (a^-2b/ab^2)^-4 | | 8-10t=-11t+4 | | 4x+8=12-2x | | Log0.8/log2= | | 3(x-9)+9x=2x-7 | | 1/9n^2=2/9n-5 | | n+2=n*6-16 | | 4c-56+54-33= | | 14m+-8m+19=-5 | | -14+x=30x+15 | | 14m+-8m+9=-5 | | n+2=1n+18 | | 3(b-12)-7=5 | | 3+N=6.25 | | 6(14x-21)=14(17x-6) |

Equations solver categories