-10a^2-a+8=0

Simple and best practice solution for -10a^2-a+8=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 -10a^2-a+8=0 equation:


Simplifying
-10a2 + -1a + 8 = 0

Reorder the terms:
8 + -1a + -10a2 = 0

Solving
8 + -1a + -10a2 = 0

Solving for variable 'a'.

Begin completing the square.  Divide all terms by
-10 the coefficient of the squared term: 

Divide each side by '-10'.
-0.8 + 0.1a + a2 = 0

Move the constant term to the right:

Add '0.8' to each side of the equation.
-0.8 + 0.1a + 0.8 + a2 = 0 + 0.8

Reorder the terms:
-0.8 + 0.8 + 0.1a + a2 = 0 + 0.8

Combine like terms: -0.8 + 0.8 = 0.0
0.0 + 0.1a + a2 = 0 + 0.8
0.1a + a2 = 0 + 0.8

Combine like terms: 0 + 0.8 = 0.8
0.1a + a2 = 0.8

The a term is 0.1a.  Take half its coefficient (0.05).
Square it (0.0025) and add it to both sides.

Add '0.0025' to each side of the equation.
0.1a + 0.0025 + a2 = 0.8 + 0.0025

Reorder the terms:
0.0025 + 0.1a + a2 = 0.8 + 0.0025

Combine like terms: 0.8 + 0.0025 = 0.8025
0.0025 + 0.1a + a2 = 0.8025

Factor a perfect square on the left side:
(a + 0.05)(a + 0.05) = 0.8025

Calculate the square root of the right side: 0.895823643

Break this problem into two subproblems by setting 
(a + 0.05) equal to 0.895823643 and -0.895823643.

Subproblem 1

a + 0.05 = 0.895823643 Simplifying a + 0.05 = 0.895823643 Reorder the terms: 0.05 + a = 0.895823643 Solving 0.05 + a = 0.895823643 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-0.05' to each side of the equation. 0.05 + -0.05 + a = 0.895823643 + -0.05 Combine like terms: 0.05 + -0.05 = 0.00 0.00 + a = 0.895823643 + -0.05 a = 0.895823643 + -0.05 Combine like terms: 0.895823643 + -0.05 = 0.845823643 a = 0.845823643 Simplifying a = 0.845823643

Subproblem 2

a + 0.05 = -0.895823643 Simplifying a + 0.05 = -0.895823643 Reorder the terms: 0.05 + a = -0.895823643 Solving 0.05 + a = -0.895823643 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-0.05' to each side of the equation. 0.05 + -0.05 + a = -0.895823643 + -0.05 Combine like terms: 0.05 + -0.05 = 0.00 0.00 + a = -0.895823643 + -0.05 a = -0.895823643 + -0.05 Combine like terms: -0.895823643 + -0.05 = -0.945823643 a = -0.945823643 Simplifying a = -0.945823643

Solution

The solution to the problem is based on the solutions from the subproblems. a = {0.845823643, -0.945823643}

See similar equations:

| .12t-.6=-16 | | 3(x-4)+2(x+1)=11 | | -8(w+-3)=-25 | | 8/3(-21/2) | | 3x+9+2x+6x+5x-3=180 | | 3.5(0.5x-4)=3/2x-1.2 | | 3x+9+2x+6x+5x-3=360 | | 9+4y=41 | | 3x+9+2x+6x+5x-3= | | 5x+x-6=2x+1 | | 0.5(k+5)(k+2)=44 | | 3/2-x=1/2 | | B/4=28 | | 4+7y=25 | | -6v^2+v=0 | | 8y+3x=88 | | 5*(x+2)=45 | | (16st)^2/3/64s^3t^-7)^2/3*(4s^-2/2t^1/3)^-1 | | 5/7p=20 | | 3(2y-3)-y=4 | | 14-6(3m+7)=-2m-16 | | 27-32=x | | 2n+25=27 | | -49=9x^2-42x | | 11-44=3(x-5)-9 | | 2w/7=9/5 | | -4=-5x-7 | | 42=34-x | | 13=x^2-6x+153 | | 7(5x-3)=49 | | y/8+12=-28 | | 13=x^2-6x+140 |

Equations solver categories