If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( k )
k < 0
2*k < 0
k < 0
2*k < 0
2*k < 0
2*k+0 < 0 // - 0
2*k < 0 // : 2
k < 0/2
k < 0
k in <0:+oo)
40 = 4*(2*k)^(1/4)*k^(3/4) // - 4*(2*k)^(1/4)*k^(3/4)
40-(4*(2*k)^(1/4)*k^(3/4)) = 0
40-4*(2*k)^(1/4)*k^(3/4) = 0
40-4*2^(1/4)*k = 0 // - 40
-4*2^(1/4)*k = -40 // : -4*2^(1/4)
k = -40/(-4*2^(1/4))
k = 10*2^(-1/4)
k = 10*2^(-1/4)
| 12x-12=7x+83 | | 40=4(2k)^(1/4)k^(3/4) | | 0.2(x+750)=350 | | 4+2x-2=9x+5-6x | | 5.7x+9.91=-15.17 | | 4x+2=2x(-6) | | X^2-2/7x-2/49=0 | | y=10x^2+4x-5 | | 0.2(x+750)=290 | | 6x+5y=40 | | 2(3x-3)= | | 12x+26=23x-73 | | 49-16x^2= | | Z^2+z+2=0 | | X^2-2/7x-2/49 | | 2-y-8=8 | | 5x+3=15x-103 | | (11/5)(4/5) | | 4(2z+1)=8z | | x^(5/4)*x^(11/4) | | 5.94x+5.94=11.88 | | x+(-14)=2 | | 24=(2,5-1,5)/(14-x) | | (3x^2)+2x-5=0 | | 25x^2-20xy+3y^2= | | 0.5(x+6)=5 | | 5x7/2 | | 7x+2=8x+5 | | 8y-1+3c=3y+7-1c | | -5x211/12 | | 9m+16m=200 | | 5y-16-2x=0 |