5) m²-16 (m-4)(m+4) (m-4)
------------------ = ------------------ = ------------
m²+8m+16 (m+4)² (m+4)
1) a⁸b³ +a⁶b⁵ a⁶b³(a²+b²)
------------------ = ------------------ = a²+b² (0,3)²+(-0,4)²=0,09+0,16=0.25
a⁶b³ a⁶b³
2) 7c³-28c 7c*(c²-4) 7c*(c-2)(c+2) 7c*(c-2)
---------------------- = --------------------- = ---------------------- = ------------------
12c+12c²+3c³ 3c*(4+4c+c²) 3c(c+2)² 3c(c+2)
7*5*(5-2) 105
--------------- = ------------ -1
3*5*(5+2) 105
3) (2x-2y)² 4(x-y)² 2(x-y) 2*(0,2-(-0,4)) 1,2
------------------- = ------------------- = ------------ --------------------- = --------- = -6
2x²-2y² 2(x-y)(x+y) (x+y) 0,2+(-0,4) -0,2
4) 4х²-40ху+100у² (2х-10у)² 4(х-5у)² 4 (х-5у)
---------------------------- = --------------- = -------------- = - --------------
15у-3х 3*(5у-х) - 3 (х-5у) 3
-4*0.6/3=- 0,8