If it's not what You are looking for type in the equation solver your own equation and let us solve it.
Simplifying
-4b2 + 81 = 0
Reorder the terms:
81 + -4b2 = 0
Solving
81 + -4b2 = 0
Solving for variable 'b'.
Move all terms containing b to the left, all other terms to the right.
Add '-81' to each side of the equation.
81 + -81 + -4b2 = 0 + -81
Combine like terms: 81 + -81 = 0
0 + -4b2 = 0 + -81
-4b2 = 0 + -81
Combine like terms: 0 + -81 = -81
-4b2 = -81
Divide each side by '-4'.
b2 = 20.25
Simplifying
b2 = 20.25
Take the square root of each side:
b = {-4.5, 4.5}
| 3(20+h)=1 | | f(x)=ln(x^4+e^2x) | | -24=-10a | | p=2m+n | | 2x-(-x+5)=6+(x+1) | | 11=h+3 | | 43o+8+6o=-90 | | 2(50-x)=40 | | -4=y/5 | | -25x-17=12x-8 | | X(5x-1)+5=5x(x-5)+x | | 6+4+f+f+2= | | 8z-5=73+2z | | 6x=74 | | f^2-3f=0 | | 2.25t+5=0.75x+50 | | 26x-14x+x= | | (24x-18)/6 | | 0.10(m-100)+15+20=0.05m | | 3x^2=19+14 | | 3x+2y+6=10 | | e^2-12e=0 | | -4x+6y=6 | | (xy+3z)(xy-3z)= | | 0.10(m-100)+15+20=0.05 | | 7a(4x-4)= | | 4/3t=-5/2 | | -2x-7+6x+1=7 | | (3y-7)(1-y)=0 | | 1650-25n=1325 | | 5/x=100/200 | | 42x+24x^2= |