4x^2+8=-9x

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


Simplifying
4x2 + 8 = -9x

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

Solving
8 + 4x2 = -9x

Solving for variable 'x'.

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

Combine like terms: -9x + 9x = 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:

| -3x+8x-4=x-8 | | 7x+2=8x+2x-1 | | 14x^2+44x+29=-1+7x^2-3x | | 47-6(4x-13)=-124 | | .6x-.625x=26 | | -4x^2-11x+5=-6x^2 | | 6x+3x+4=7x-6 | | 14x-11x+5=-6x | | 6n^2-24=18n | | -6(x+2)=-4(x-4) | | 6n^2-24=28 | | 4x^2=-16x+128 | | 2a^2+10a=12 | | 7b^2-35b=98 | | 2m^2+6=8m | | -8(x+5)=2(x-5) | | 2m^2+6=0 | | (3+7i)(1-2i)= | | (n+1)(2n+3)=0 | | (r-1)(r+2)=0 | | (5+3y)+(5-y)= | | 12(5-3k)=20 | | 2x+4=4x+7 | | 2m^2-8m+3=0 | | 3n+5=n+13 | | 1x=3+.5x | | 200x+300y=15 | | log(7)(5x+3)+log(7)(x+1)=1 | | 28x+23=18x+1 | | -6(x+5)=4x+10 | | 4.1-0.7x=3.6 | | 40y-20-20=150y-250+30 |

Equations solver categories