= (M^2 - 10M - 6M + 64 ) / ( M^2 - 64) = ( M^2 - 16M + 64) / ( M^2 - 64 ) =
= ( M - 8)*( M - 8 ) / ( M - 8) * ( M + 8 ) = ( M - 8) / ( M + 8 )
(x-4)(x-5)
(x-5)(5-2x)
(x-7)(5-ч)
-3-12х=6х-21
-3+21=6х+12х
18=18х
Х=18:18
х=1
H(t)=-5t²+50t
-5t²+50t=20
-5t²+50t-20=0
5t²-50t+20=0
t²-10t+4=0
D1=25-4=21
t=5±√21
t1=5+√21
t2=5-√21
h(5+√21)=-5(5+√21)²+
50*(5+√21)=-125-50√21-
105+50√21+250=-230+
250=20
h(4)=-5*16+50*4=-80+100=20
h(5)=-5*25+50*5=-75+150=75