(x2 – 100) (x2 – 196) = –3(x2 – 24x +140)
x2–196=(x–14)·(x+14)
x2–24x+140=(x–10)·(x–14)
(x–10)·(x–14)·(x+10)·(x+14)+3·(x–10)·(x–14)=0
(x–10)·(x–14)· ((х+10)·(х+14)+3)=0
(x–10)·(x–14)· (x2+24x+143)=0
x–10=0 или х–14=0 или x2+24x+143=0
x=10 или х=14 или D=242–4·143=4 x=–13 или х=–11
О т в е т. –13; –11; 10; 14