4a^2-81b^2=

Simple and best practice solution for 4a^2-81b^2= 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 4a^2-81b^2= equation: 


Simplifying
4a2 + -81b2 = 0

Solving
4a2 + -81b2 = 0

Solving for variable 'a'.

Move all terms containing a to the left, all other terms to the right.

Add '81b2' to each side of the equation.
4a2 + -81b2 + 81b2 = 0 + 81b2

Combine like terms: -81b2 + 81b2 = 0
4a2 + 0 = 0 + 81b2
4a2 = 0 + 81b2
Remove the zero:
4a2 = 81b2

Divide each side by '4'.
a2 = 20.25b2

Simplifying
a2 = 20.25b2

Take the square root of each side:
a = {-4.5b, 4.5b}

See similar equations:

| y=-3-19 | | -4m^3(2m+6-4b)=0 | | 60=4*10+b | | 6xy+2x+15y+5= | | 13x+26x^2-39x^3= | | 25(879)+4= | | x+77=104 | | 1/3k-(k+1/3)=1/9(k+1) | | 5+2m-3=9m+6-5m | | (x^3+11x^2+2x+10)-(-4x^3+6x^2+6x+7)= | | 120-5x=9 | | 16(t-6)+5t=7(3t+5)-12 | | 8y+18y=130 | | z/8=-7 | | 4/3x+1/5y=2 | | 10=2*-2+b | | T-(-3.7)=-7.2 | | -5+8=6-7p | | 116*11/58*1/4 | | 3.1q-4.5-4.5q=2.4q-3.7 | | n-16=m | | 4x-31=10+4x | | r+30=13 | | z-30=-42 | | 3i+2i= | | 33000*2374= | | 5z^2+27z+10= | | 39/25*10/99*27/26 | | 500*66*2374= | | 15x^2-4x-35=0 | | 2x^2+16x+24= | | 9w-3p-6w+27p= |

Equations solver categories