8x^2=-5x-9

Simple and best practice solution for 8x^2=-5x-9 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-9 equation:


Simplifying
8x2 = -5x + -9

Reorder the terms:
8x2 = -9 + -5x

Solving
8x2 = -9 + -5x

Solving for variable 'x'.

Reorder the terms:
9 + 5x + 8x2 = -9 + -5x + 9 + 5x

Reorder the terms:
9 + 5x + 8x2 = -9 + 9 + -5x + 5x

Combine like terms: -9 + 9 = 0
9 + 5x + 8x2 = 0 + -5x + 5x
9 + 5x + 8x2 = -5x + 5x

Combine like terms: -5x + 5x = 0
9 + 5x + 8x2 = 0

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

Divide each side by '8'.
1.125 + 0.625x + x2 = 0

Move the constant term to the right:

Add '-1.125' to each side of the equation.
1.125 + 0.625x + -1.125 + x2 = 0 + -1.125

Reorder the terms:
1.125 + -1.125 + 0.625x + x2 = 0 + -1.125

Combine like terms: 1.125 + -1.125 = 0.000
0.000 + 0.625x + x2 = 0 + -1.125
0.625x + x2 = 0 + -1.125

Combine like terms: 0 + -1.125 = -1.125
0.625x + x2 = -1.125

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 = -1.125 + 0.09765625

Reorder the terms:
0.09765625 + 0.625x + x2 = -1.125 + 0.09765625

Combine like terms: -1.125 + 0.09765625 = -1.02734375
0.09765625 + 0.625x + x2 = -1.02734375

Factor a perfect square on the left side:
(x + 0.3125)(x + 0.3125) = -1.02734375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

See similar equations:

| -3(7d+6)= | | X^2+2x+y^2+14y-31=0 | | 7-(3y-4)= | | 2x-8x+6x-3x= | | 5m=12m-30 | | x^2-0.1x-0.02=0 | | 3(3x-2)=10x | | 16x^2-96x-9y^2+36y-36=0 | | 6x^2+4x-2=0 | | 3.15x-3=0.3x^2 | | 4n^2=-12n-2 | | x^5-x=0 | | 6y=5(y+12) | | x+12=45-x | | X^2+y^2+6y-27=0 | | -3d+5+d=3-2d+5 | | 5x-3.2=6.3 | | X^2+4y^2+8x-48=0 | | 4b^2+28b+49=0 | | 3x-5+x=6+4x-2 | | 16+2x=10+8x | | 27a^3+18a^2=-3a | | 151-4x=32x+15 | | 7n+5=19 | | 36x+6=10 | | 18a=15a+27 | | 5x+6=-18+-7x | | 7r^2-4r=3r^2-1 | | 3(4h-2)-4h=11(3-4h)+39h | | a^2b-16b=0 | | 2x=148 | | A+4(2a+1)=3(3a-2)+10a |

Equations solver categories