1)
3^5/3^4 = 3
2)
4^4/4^5 = 1/4
3)
2,3^4/2,3^3 = 2,3
4)
(-0,8)^3/(-0,8)^2 = -0,8
1) х2/у -у2/х= х3-у3/ух= (х-у)(х+х2*у2+у)/ух;
2) 1/у +1/х- 1/у+х= х+у-1/у+х;
3) (х-у)(х+х2*у2+у)/ух : х+у-1/у+х= (х-у)(х+х2*у2+у)/ух * у+х/х+у-1= (х-у)(х+ху+у)/-1= х2 +х2у/-1
(2x+1)(2x-1)-(2x-3)² = 4х² - 1 - 4х² + 12х - 9 = 12х - 10
При х = 3/4 получаем 12 · 3/4 - 10 = -1
1) -3(a^2-b^2)+b(9a^2-1)=(a-b)(a+b)(3a-1)(3a+1)(b-3)
3) 2b(b^2-2)-7c(b^2-2)=(b^2-2)(2b-7c)
4) 6(x^5-y^3)+x^2y(4y-9x)=(x^5-y^3)(4y-9x)(6+x^2y)