M!/3!(m-3)!=4/15*(m+2)!/4!(m-2)!
(m-3)!(m-2)(m-1)m/1*2*3*(m-3)!=4(m-2)!(m-1)m(m+1)(m+2)/15(m2)!*1*2*3*4
(m-2)(m-1)m/1*2*3=(m-1)m(m+1)(m+2)/15*1*2*3
15(m-2)(m-1)m-(m-1)m(m+1)(m+2)=0
(m-1)m(15m-30-m²-3m-6)=0
m-1=0⇒m=1 не удов усл
m=0 не удов усл
m²-12m+32=0
m1+m2=12 u m1*m2=32
m1=4 U m2=8