35.15. 1) (522 - 6k)2-(522 + 3k) + 90z4k = 27k2; 2) (m2 - n) (m2 + n2) - m(m2-n) - mn? = -nº;
3) (1,2x4 - 7y?) (1,2x4 + 7y?) +0,56x8 + 49y4 = 2x8;
4) (1,4a3 - 562) (1,4a² + 562) -2,96a6 + 2564 = -a.​

Sdhinkj    1   22.02.2021 16:36    5