((х-5)(х+5))2+((х+5)(х-2))2=0 => (х-5)2*(х+5)2+(х+5)2*(х-2)2=0 => (х+5)2*((х-5)2+(х-2)2)=0 =>
(х+5)2=0 и ((х-5)2+(х-2)2)=0-не имеет решений => х=-5
