If it's not what You are looking for type in the equation solver your own equation and let us solve it.
Simplifying
81 + -16x2 = 0
Solving
81 + -16x2 = 0
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-81' to each side of the equation.
81 + -81 + -16x2 = 0 + -81
Combine like terms: 81 + -81 = 0
0 + -16x2 = 0 + -81
-16x2 = 0 + -81
Combine like terms: 0 + -81 = -81
-16x2 = -81
Divide each side by '-16'.
x2 = 5.0625
Simplifying
x2 = 5.0625
Take the square root of each side:
x = {-2.25, 2.25}
| 1/3x=20/3 | | h-8=h+3 | | Y-4/9=5/27 | | 19s=49 | | 1+c=log(-5c-3) | | 94=900 | | x+4+10(x-1)+4x=24 | | x-3/2-1=x-1/3 | | -2-5/4x=13 | | 10x-1+78=18x+13 | | 6(x+3)+9=27 | | 4-(5)= | | 15-3(3x-1)=12 | | (w/5)-4=(w/3) | | 6-15q=11q-46 | | 1.12x=141000000 | | -31=5n+6n | | 6m=3-2m^2 | | 7(x+3)=2x+9+9x | | 8(y+7)=5y-8+2y | | 1+c=ln(-5c-3) | | 180-x=3(90-k) | | .5(b+6)=1.5b-1 | | 2b-13=4 | | 90=-22+x | | 44r=20 | | t-(5+2t)+(t-7)= | | f(6)=-36 | | 84=-8x-4(-6x+3) | | -6p+7=121 | | -6x-12=-18+5x | | 5(9s-2t+u)= |