Question

Помогите номер 1 и 3 даю 20б

Answer 1

Объяснение:

1.

1)

-5my⁵/9a³ • 27a⁴/10m²y=

= -3ay⁴/2m

2)

(7p-7n)/4x • (2x²-6x)/(p²-n²)=

=(7(p-n))/4x • (2x(x-3))/((p-n)(p+n))=

= (7(x-3))/(2(p+n)

2.

1) (-3p³/c)²=9p⁶/c²

2) (t¹⁰m/a²)⁵=t⁵⁰m⁵/a¹⁰

3.

14m²n/5b² : (-7mn²)=

= -14m²n/5b² • 1/7mn²=

= -2m/5b²n

2)

(6m-2)/15p² : (1-9m²)/25p³=

=(2(3m-1))/15p² : ((1-3m)(1+3m))/25p³=

=(-2(1-3m))/15p²•25p³/((1-3m)(1+3m))=

= -10p/(3(1+3m))