If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( y )
y = 0
y = 0
y = 0
y in (-oo:0) U (0:+oo)
10/y-(3*y) = 315 // - 315
10/y-(3*y)-315 = 0
10/y-3*y-315 = 0
10*y^-1-3*y^1-315*y^0 = 0
(10*y^0-3*y^2-315*y^1)/(y^1) = 0 // * y^2
y^1*(10*y^0-3*y^2-315*y^1) = 0
y^1
10-3*y^2-315*y = 0
10-3*y^2-315*y = 0
DELTA = (-315)^2-(-3*4*10)
DELTA = 99345
DELTA > 0
y = (99345^(1/2)+315)/(-3*2) or y = (315-99345^(1/2))/(-3*2)
y = (99345^(1/2)+315)/(-6) or y = (315-99345^(1/2))/(-6)
y in { (99345^(1/2)+315)/(-6), (315-99345^(1/2))/(-6)}
y in { (99345^(1/2)+315)/(-6), (315-99345^(1/2))/(-6) }
| x+9/20=3/4 | | 36-yi-4x+3i=0 | | 6d-2d-5d-7-3d=0 | | 4/w=-16 | | W+6=22 | | 5=w-7 | | -7/2=-4/7y | | 3y-20=180 | | 2x+6(3)=9(6) | | a-(-2)+3=-2 | | 4=(3+1)(3+1) | | 2=n+(-4) | | 4x+8x=108 | | 2.1-0.06= | | .4(x-3.5)+1.4=.875 | | (5,3),m=1/2 | | 6l+30=72 | | -100=-3/5h | | 9(b-4)-7b=5(3b-z) | | 30y=5 | | x/16=12/90 | | 5a-15=60 | | 4a^2+3a=2 | | 2/3k=-9 | | z^2-4iz=0 | | 7x^2+2=9x | | 14r+24=10r+2r+30 | | (-6x-11)-(-2x+4)= | | 16+t=7 | | (6z/7)-(4z/9)=1 | | 5(-14.5)-3(-54.5)=25 | | 5x+4=5x+-2 |