1/ (a-3) = -(a+1) / (a-9) = 4+a /2a
1/(a-3) = (4+a) /2a
2a*1=(a-3)(4+a)
2a=4a+a²-12-3a
a²+a-12-2a=0
a²-a-12=0
D=1²-4*(-12)*1=1+48=49=7²
a1=1+7/2 = 8/2=4
a2=1-7/2=-6/2=-3
TR=24+8=32 см
SR=24+4=28 см
Р=ST+TR+SR=24+32+28=88 см
Ответ. 88 см
<span><span>730:2=365</span><span>608:4 =152</span><span> 918:3= 306</span><span>345:5= 69</span><span>636:6= 106</span><span>904:8= 113</span>
</span><span />