If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( m )
14*m^2-(21*m) = 0
14*m^2-(21*m) = 0
14*m^2-(21*m) = 0
14*m^2-21*m = 0
14*m^2-21*m = 0
DELTA = (-21)^2-(0*4*14)
DELTA = 441
DELTA > 0
m = (441^(1/2)+21)/(2*14) or m = (21-441^(1/2))/(2*14)
m = 3/2 or m = 0
m in (-oo:0) U (0:3/2) U (3/2:+oo)
(10*m^2-(15*m))/(14*m^2-(21*m)) = 0
(10*m^2-15*m)/(14*m^2-21*m) = 0
10*m^2-15*m = 0
5*m*(2*m-3) = 0
2*m-3 = 0 // + 3
2*m = 3 // : 2
m = 3/2
5*m*(m-3/2) = 0
14*m^2-21*m = 0
7*m*(2*m-3) = 0
2*m-3 = 0 // + 3
2*m = 3 // : 2
m = 3/2
7*m*(m-3/2) = 0
(5*m*(m-3/2))/(7*m*(m-3/2)) = 0
( 5*m )
5*m = 0 // : 5
m = 0
( m-3/2 )
m-3/2 = 0 // + 3/2
m = 3/2
m in { 0}
m in { 3/2}
m belongs to the empty set
| a+b+10+90=110 | | 2h+7=3h+3 | | 2(x-1)-3(x-2)=5 | | -7+7x-3x=36 | | 3+5y=9 | | 2x^2=1680 | | 9(2-a)-(5a+1)=5(3-a)-10a | | x^2=1680 | | 20x+112=40x-168+200 | | k/3-1/3k=1/k | | 1/(2m^2)=1/m-1/2 | | x+3x*2=0 | | 3x-8+4x+5= | | 1=4.5-2p+3.33 | | 6x+30-2x-8=4x-16+26+6x | | 4p+3(p-2)=1 | | A-3+8+b+c=23 | | -3b-1/4=8 | | (2k+3)(k-4)=2(k-3) | | 6x-2x=4+4x+1 | | 6x-h=-9 | | 2/7x+1=x-3/7 | | x^2-2ax+a+2=0 | | 3x+5y+2x-6y= | | .33(8y-6)=.66 | | 8c-5+2/c | | x^2*3=8 | | .333(5k+6)=12 | | 18-x-7+5x=14-x+3+2x | | .33(5k+6)=12 | | 18-x-7+5=14-x+3+2x | | 0.5(4h-6)=3 |