8x^2-5x-10=0

Simple and best practice solution for 8x^2-5x-10=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 8x^2-5x-10=0 equation:


Simplifying
8x2 + -5x + -10 = 0

Reorder the terms:
-10 + -5x + 8x2 = 0

Solving
-10 + -5x + 8x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
8 the coefficient of the squared term: 

Divide each side by '8'.
-1.25 + -0.625x + x2 = 0

Move the constant term to the right:

Add '1.25' to each side of the equation.
-1.25 + -0.625x + 1.25 + x2 = 0 + 1.25

Reorder the terms:
-1.25 + 1.25 + -0.625x + x2 = 0 + 1.25

Combine like terms: -1.25 + 1.25 = 0.00
0.00 + -0.625x + x2 = 0 + 1.25
-0.625x + x2 = 0 + 1.25

Combine like terms: 0 + 1.25 = 1.25
-0.625x + x2 = 1.25

The x term is -0.625x.  Take half its coefficient (-0.3125).
Square it (0.09765625) and add it to both sides.

Add '0.09765625' to each side of the equation.
-0.625x + 0.09765625 + x2 = 1.25 + 0.09765625

Reorder the terms:
0.09765625 + -0.625x + x2 = 1.25 + 0.09765625

Combine like terms: 1.25 + 0.09765625 = 1.34765625
0.09765625 + -0.625x + x2 = 1.34765625

Factor a perfect square on the left side:
(x + -0.3125)(x + -0.3125) = 1.34765625

Calculate the square root of the right side: 1.160885976

Break this problem into two subproblems by setting 
(x + -0.3125) equal to 1.160885976 and -1.160885976.

Subproblem 1

x + -0.3125 = 1.160885976 Simplifying x + -0.3125 = 1.160885976 Reorder the terms: -0.3125 + x = 1.160885976 Solving -0.3125 + x = 1.160885976 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.3125' to each side of the equation. -0.3125 + 0.3125 + x = 1.160885976 + 0.3125 Combine like terms: -0.3125 + 0.3125 = 0.0000 0.0000 + x = 1.160885976 + 0.3125 x = 1.160885976 + 0.3125 Combine like terms: 1.160885976 + 0.3125 = 1.473385976 x = 1.473385976 Simplifying x = 1.473385976

Subproblem 2

x + -0.3125 = -1.160885976 Simplifying x + -0.3125 = -1.160885976 Reorder the terms: -0.3125 + x = -1.160885976 Solving -0.3125 + x = -1.160885976 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.3125' to each side of the equation. -0.3125 + 0.3125 + x = -1.160885976 + 0.3125 Combine like terms: -0.3125 + 0.3125 = 0.0000 0.0000 + x = -1.160885976 + 0.3125 x = -1.160885976 + 0.3125 Combine like terms: -1.160885976 + 0.3125 = -0.848385976 x = -0.848385976 Simplifying x = -0.848385976

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.473385976, -0.848385976}

See similar equations:

| 3x-20=5x | | 8x+4y=20 | | 3x=20+5x | | 8+4=y | | 3(2x-1)=0.5(4x-2)+2 | | -2y(18-3y)=7y+2y | | 12x^2+19x+5=0 | | 2h=(9-4)4h | | L=2W+5 | | 240=1.8c+32 | | 240=1 | | -50.00-45.00(10)= | | 18+(1+m)-6=24 | | -5x+10=1500 | | 27-8=b | | x+3y=-5 | | 3x+8=(x+6) | | c=0.16tm | | -50.00-45.00x=10 | | 5x-1y=-10 | | 2x+6=66-4x | | 2x+6=66-4x | | 9x+11=13x-1 | | 15=3x-4 | | 10x-4(x-2)=2x+16 | | -3x-6=15 | | a^2+5ab-6b^2=0 | | 5n^3+15n^2+25n=0 | | 20x-7=40x+5 | | 1+10x=100+x | | (x+3y)(4x-10y)= | | 68-4x=32x+20 |

Equations solver categories