№ 111. 7 15 x 2 ⋅ 7 35 17 ,5 = = = ; 6x 3 6x 3 2x x 25 ⋅ 2 y 3 25 25 ⋅ 2y3 = = б) y; 2 16 y 16 y 2 8
а) 15 x 2 ⋅
4a 6am 2 ⋅ 4a 8a 2 ; = = m 3m 3 3m 3 2b 2b ⋅ 10a 2 4b ⋅ 10a 2 = = г) . 3 5a 5a 3 a
в) 6am 2 ⋅
№ 112. а)
48 x 5 ⋅ 7 y 2 48 x 5 7 y 2 3x 2 ⋅ = = ; 49 y 4 16 x 3 49 y 4 ⋅ 16 x 3 7 y 2
18m 3 22n 4 18m 3 ⋅ 22n 4 ⋅ = = 4mn; 11n 3 9m 2 11n 3 ⋅ 9m 2 15 p 4 16q 5 15 p 4 ⋅ 16q 5 6p ⋅ = =− ; в) − 6 3 6 3 8q 25 p 8q ⋅ 25 p 5q
б)
г)
72 x 4 25 y 5
2 ,5 y 4 72 x 4 ⋅ 2,5 y 4 8 ⋅ 25 y 4 8 4 =− =− =− =− ; ⋅ − 5 5 5 5 ⋅ ⋅ 27 x 25 y 27 x 3 x 250 y 30 xy 15 xy
д) −
35ax 2 8ab 35ax 2 ⋅ 8ab 10a 2 x ⋅ = = − ; 12b 2 y 21xy 12b 2 y ⋅ 21xy 9by 2
е) −
25 x 3 y 3 14a 2 b
21ab ⋅ − 2 2 10 x y
25 x 3 y 3 ⋅ 21ab 15 xy = = . 2 2 2 4a 14a b ⋅ 10 x y
№ 113. 14a 2 b 8 x 2 14a 2 b ⋅ 8 x 2 16 ⋅ = 3 = ; 3 2 3x 21a b 3 x ⋅ 21a 2 b 9 x 9a 2 5ax 9a 2 ⋅ 5ax 3a 3 ⋅ = = б) ; 2 2 25 x y 6 y 25 x y ⋅ 6 y 10 xy 2
а)
в) −
10 x 2 y 2 27 a 3 6a 3 x 2 y 2 ⋅ =− = −6axy ; 2 9a 5 xy a 2 xy
www.5balls.ru