If it's not what You are looking for type in the equation solver your own equation and let us solve it.
m in (-oo:+oo)
81-((16/25)*m^2) = 0
(-16/25)*m^2+81 = 0
-16/25*m^2 = -81 // : -16/25
m^2 = 2025/16
m^2 = 2025/16 // ^ 1/2
abs(m) = 45/4
m = 45/4 or m = -45/4
m in { 45/4, -45/4 }
| 6(x+1)-5-2x=5(x-3) | | 8y=6x+2 | | Ln(y-3)=-4+lnc | | 2d-25=17 | | -(x-1)=5x+7 | | x^2-9*x+18=0 | | 4(x-2)=6-2(-3x+5) | | 3-2(x-3)=21 | | 25x-16= | | 2k^2-7k-72=0 | | y+10*x=60 | | 18-4x=9-7x | | -20+x=-(x+1) | | 2x/8x=1/164 | | -15n=-12n+3 | | Ln(6x+8)=ln(2x+15) | | 25x-4= | | 4x+6-x-14= | | 30x+5=20x+15 | | 95-(5x+14)=5(x+3)+x | | 2a+8a+4a-2= | | 4x-3(x+1)=-3+2(x-6) | | 8(4k+3)=-123 | | m^2+n^5=324 | | 8x+15=-7x-18 | | 1/3(4•3)2 | | 2(y+3)=y+13 | | 7(2k+1)=-105 | | 3y-9+2y=26 | | -8x+3x=-24+25x | | x^2+4x+y^2+2y-95=0 | | 19-15=4a-3 |