Question

ОЧЕНЬ СРОЧНО!!!! ДАЮ 70 БАЛЛОВ!!!!​

Answer 1

Ответ:

Объяснение:

1. 1) 9a²x=(3a)²x=3a·3ax:

(7xy)/(3a)=(7xy·3ax)/(3a·3ax)=(21ax²y)/(9a²x)

2) x²-25=(x-5)(x+5):

(4x)/(x-5)=(4x(x+5))/((x-5)(x+5))=(4x(x+5))/(x-25)

3) 6a-2=2(3a-1):

(2a)/(3a-1)=(2a·2)/((3a-1)·2)=(4a)/(6a-2)

2. 1) 2a²b·4b=8a²b²; 8ab²·a=8a²b²

3/(2a²b)=(3·4b)/(2a²b·4b)=(12b)/(8a²b²)

2/(8ab²)=(2a)/(8ab²·a)=(2a)/(8a²b²)

(12b)/(8a²b²) и (2a)/(8a²b²)

2) (x-3)(x+3)=x²-9

(5(x+3))/((x-3)(x+3))=(5(x+3))/(x²-9)

(2(x-3))/((x+3)(x-3))=(2(x-3))/(x²-9)

(5(x+3))/(x²-9) и (2(x-3))/(x²-9)

3)(a-2)(a+2)=a²-4

(7a(a+2))/((a-2)(a+2))=(7a(a+2))/(a²-4)

(7a(a+2))/(a²-4) и 4/(a²-4)

4) (3b)/(b-c) и -(2c)/(b-c)