Вправа 201 - 300 » 248

248. Спрости вираз. a) (–8a2(a + b)) • (a^2+ b^2)/(a^2- b^2 ) • (b-a)/〖(8a)〗^2 = (〖-8a〗^2 (a+b)(a^2+ b^2 )(b-a))/((a-b)(a+b)• 〖64a〗^2 ) = (a^2+ b^2)/8; б) (x^2-x )/(2x+2) • (x^2+ 2x+1)/(x^2+ 4x) • (x^2-16)/(3x-3) = (x(x-1)• (x+1)^2 (x-4)(x+4))/(2(x+1)•x •(x+4)•3(x-1)) = (x(x+1)(x-4))/6x = ((x+1)(x-4))/6.