Раскрываем скобки
х^2+32x+256+x^2-40x-400=2x^2
-8x=144
-x=18
x=-18
(4x-7)/16(x-√2)(x+√2)>0
x=1,75 x=√2 x=-√2
_ + _ +
--------------(-√2)---------------(√2)---------------(1,75)---------------
x∈(-√2;√2) U (1,75;∞)
1) х2-2у / х
2) 4х * |x2-y2-4| + y
7x=4+5-2/7<br />7x=9-2/7<br />7x=8,5/7<br />x=8,5/7:7<br />x=61/49<br />x=1,12/49