8x^2=2x-9

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


Simplifying
8x2 = 2x + -9

Reorder the terms:
8x2 = -9 + 2x

Solving
8x2 = -9 + 2x

Solving for variable 'x'.

Reorder the terms:
9 + -2x + 8x2 = -9 + 2x + 9 + -2x

Reorder the terms:
9 + -2x + 8x2 = -9 + 9 + 2x + -2x

Combine like terms: -9 + 9 = 0
9 + -2x + 8x2 = 0 + 2x + -2x
9 + -2x + 8x2 = 2x + -2x

Combine like terms: 2x + -2x = 0
9 + -2x + 8x2 = 0

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

Divide each side by '8'.
1.125 + -0.25x + x2 = 0

Move the constant term to the right:

Add '-1.125' to each side of the equation.
1.125 + -0.25x + -1.125 + x2 = 0 + -1.125

Reorder the terms:
1.125 + -1.125 + -0.25x + x2 = 0 + -1.125

Combine like terms: 1.125 + -1.125 = 0.000
0.000 + -0.25x + x2 = 0 + -1.125
-0.25x + x2 = 0 + -1.125

Combine like terms: 0 + -1.125 = -1.125
-0.25x + x2 = -1.125

The x term is -0.25x.  Take half its coefficient (-0.125).
Square it (0.015625) and add it to both sides.

Add '0.015625' to each side of the equation.
-0.25x + 0.015625 + x2 = -1.125 + 0.015625

Reorder the terms:
0.015625 + -0.25x + x2 = -1.125 + 0.015625

Combine like terms: -1.125 + 0.015625 = -1.109375
0.015625 + -0.25x + x2 = -1.109375

Factor a perfect square on the left side:
(x + -0.125)(x + -0.125) = -1.109375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

See similar equations:

| (4f-3+2g)-(-4g+2)= | | 10x-20y=80 | | 2+2x+5=-3x+3 | | 7/6/2 | | (2x^2+5x+5)(7x+3)= | | 21+8y=5y | | 3x-6=-6+x | | 7/8+5/6 | | 0.4(5-0.4X)=-3.2 | | (2z^2+11z+15)=0 | | (2x^7/5x^5)/(6x/25^3) | | 6.58+5.3X=-12.5 | | -6(x-2)+4=16 | | 2.5+0.075p=0.1 | | 17.89x^4+25.6x^2+9.13=0 | | 4x^2-x+20=0 | | -4/3x-2 | | X+12=87 | | 3/2*5 | | H=16t^2-64t-60 | | 3/2(5) | | (x^2/3)-(3x^1/3)-4=0 | | 2(5x+7)=7 | | 1-ln(3x+2)=0 | | 30/25 | | -.01x+60=0 | | a-w+3=-2 | | -.001x+60=25 | | -2(t+3)-2(5t-9)=-13(t-3)+2 | | -11=x/-7 | | 2x+8/5=2x/3 | | 2x+(8/5)=(2x/3) |

Equations solver categories