4x^2-9x=-8

Simple and best practice solution for 4x^2-9x=-8 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 4x^2-9x=-8 equation:


Simplifying
4x2 + -9x = -8

Reorder the terms:
-9x + 4x2 = -8

Solving
-9x + 4x2 = -8

Solving for variable 'x'.

Reorder the terms:
8 + -9x + 4x2 = -8 + 8

Combine like terms: -8 + 8 = 0
8 + -9x + 4x2 = 0

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

Divide each side by '4'.
2 + -2.25x + x2 = 0

Move the constant term to the right:

Add '-2' to each side of the equation.
2 + -2.25x + -2 + x2 = 0 + -2

Reorder the terms:
2 + -2 + -2.25x + x2 = 0 + -2

Combine like terms: 2 + -2 = 0
0 + -2.25x + x2 = 0 + -2
-2.25x + x2 = 0 + -2

Combine like terms: 0 + -2 = -2
-2.25x + x2 = -2

The x term is -2.25x.  Take half its coefficient (-1.125).
Square it (1.265625) and add it to both sides.

Add '1.265625' to each side of the equation.
-2.25x + 1.265625 + x2 = -2 + 1.265625

Reorder the terms:
1.265625 + -2.25x + x2 = -2 + 1.265625

Combine like terms: -2 + 1.265625 = -0.734375
1.265625 + -2.25x + x2 = -0.734375

Factor a perfect square on the left side:
(x + -1.125)(x + -1.125) = -0.734375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

See similar equations:

| Xplusy=12 | | 3a-7whena=7 | | lnx=-18 | | 12-1=6+5 | | 14y=12x-28 | | y-5x+6i=3-5yi | | 0.36=x+4.4x | | 4(3)-1=3(2)+5 | | 10x-22=-7 | | 1/2.78 | | 4y-4(3y+1)=-3-2(1-y) | | 4x+5x-3x-5=13 | | 4(f+7)=-32 | | 10(s+9)=-135 | | 8x^2+8x-7921=0 | | 2x-31=85 | | -x=6x | | 27-^2/3/27-^1/3 | | Log(x-5)=0 | | 2y=-4+8 | | -9=(-2x+1) | | 27^-2/3/27-^1/3 | | 2.3b+5=20-b | | 8z^2+3z-3=0 | | (-3y+5)(-3y+5)= | | 2=S/4-2 | | X+(3x+2)= | | 9=(-2x+1) | | Solve(4+y)(5y+3)=0 | | 12=3y-9 | | 3e^2=9 | | 2 = s4– 2 |

Equations solver categories