-8x^2+x+3=0

Simple and best practice solution for -8x^2+x+3=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+x+3=0 equation:


Simplifying
-8x2 + x + 3 = 0

Reorder the terms:
3 + x + -8x2 = 0

Solving
3 + x + -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'.
-0.375 + -0.125x + x2 = 0

Move the constant term to the right:

Add '0.375' to each side of the equation.
-0.375 + -0.125x + 0.375 + x2 = 0 + 0.375

Reorder the terms:
-0.375 + 0.375 + -0.125x + x2 = 0 + 0.375

Combine like terms: -0.375 + 0.375 = 0.000
0.000 + -0.125x + x2 = 0 + 0.375
-0.125x + x2 = 0 + 0.375

Combine like terms: 0 + 0.375 = 0.375
-0.125x + x2 = 0.375

The x term is x.  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.
-0.125x + 0.25 + x2 = 0.375 + 0.25

Reorder the terms:
0.25 + -0.125x + x2 = 0.375 + 0.25

Combine like terms: 0.375 + 0.25 = 0.625
0.25 + -0.125x + x2 = 0.625

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = 0.625

Calculate the square root of the right side: 0.790569415

Break this problem into two subproblems by setting 
(x + 0.5) equal to 0.790569415 and -0.790569415.

Subproblem 1

x + 0.5 = 0.790569415 Simplifying x + 0.5 = 0.790569415 Reorder the terms: 0.5 + x = 0.790569415 Solving 0.5 + x = 0.790569415 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 = 0.790569415 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 0.790569415 + -0.5 x = 0.790569415 + -0.5 Combine like terms: 0.790569415 + -0.5 = 0.290569415 x = 0.290569415 Simplifying x = 0.290569415

Subproblem 2

x + 0.5 = -0.790569415 Simplifying x + 0.5 = -0.790569415 Reorder the terms: 0.5 + x = -0.790569415 Solving 0.5 + x = -0.790569415 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 = -0.790569415 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -0.790569415 + -0.5 x = -0.790569415 + -0.5 Combine like terms: -0.790569415 + -0.5 = -1.290569415 x = -1.290569415 Simplifying x = -1.290569415

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.290569415, -1.290569415}

See similar equations:

| 600=116x-231535 | | 3(2x-3)=6(x+1)-10 | | 2x=3y+9 | | 3x+3=2x+22 | | 2x-(3x+7)=18 | | 1.1=0.04x-79.10 | | 5a-15=15 | | 5(3v+8)=145 | | 1.8r+9=5.7r | | 112=-4c+84 | | 1.8r+9=5.7r-1 | | (5x-2)(x-3)=-17x+10 | | 490=106x-211523 | | 700=108x-215626 | | 4=12+x | | -x^2+5x+750=0 | | 6p+3=6p+15 | | 4(x+2)+2=4x+8 | | -7w-19=9 | | 700000000=108x-215626 | | -6m+2-7m-3=5-2m+8 | | 22-10b=9 | | 8-(5-6x)=3(1+2x) | | .3333y+4=y-2 | | 8+4x=9x-7 | | 16(n+3)=4(12+4n) | | I=108x-215626 | | 2(2y+1)=2(y-13) | | 2s+3s+7=7s+5+4(6) | | 4(3x-5)=-2(-x+8)-6x | | 3k^2+k-2=0 | | 8x+2=x+7 |

Equations solver categories