16x^2+36x+81=0

Simple and best practice solution for 16x^2+36x+81=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 16x^2+36x+81=0 equation:


Simplifying
16x2 + 36x + 81 = 0

Reorder the terms:
81 + 36x + 16x2 = 0

Solving
81 + 36x + 16x2 = 0

Solving for variable 'x'.

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

Divide each side by '16'.
5.0625 + 2.25x + x2 = 0

Move the constant term to the right:

Add '-5.0625' to each side of the equation.
5.0625 + 2.25x + -5.0625 + x2 = 0 + -5.0625

Reorder the terms:
5.0625 + -5.0625 + 2.25x + x2 = 0 + -5.0625

Combine like terms: 5.0625 + -5.0625 = 0.0000
0.0000 + 2.25x + x2 = 0 + -5.0625
2.25x + x2 = 0 + -5.0625

Combine like terms: 0 + -5.0625 = -5.0625
2.25x + x2 = -5.0625

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 = -5.0625 + 1.265625

Reorder the terms:
1.265625 + 2.25x + x2 = -5.0625 + 1.265625

Combine like terms: -5.0625 + 1.265625 = -3.796875
1.265625 + 2.25x + x2 = -3.796875

Factor a perfect square on the left side:
(x + 1.125)(x + 1.125) = -3.796875

Can't calculate square root of the right side.

The solution to this equation could not be determined.

See similar equations:

| (X-1)+2(x-2)+(x-3)=0 | | 37x=1 | | X+(0.05)x=28.5 | | 4p+1=25-1 | | X-1+2x-2+x-3=0 | | 5.3=.5x | | 2x-0.3=8.7 | | n^2+9n-90=0 | | 26-2x=17+7x | | 2x+1=19-x | | 3x+3(x-2.5)=4.5 | | 2w+6x-12y+4w+6x+4y= | | 12=4x+40 | | .05x=230 | | n+11+3n=20+7n | | 256=2x | | lx-1l+2lx-2l+lx-3l=0 | | .05b=230 | | 2.3+x=3 | | x/8=3/x | | 2z/9-4=-5 | | x+5=6.7 | | 6(x-5)=10x-50 | | 2x+6=4x+18 | | 6x+9=31-4x | | 1/6y-4=-12 | | (6x/2)^2 | | (20-2x)=(3x+40) | | 3t+4=5t-8 | | 4n/7 | | -5y=-3x-19 | | 2x-3.2=1.6 |

Equations solver categories