Question

Решите 2-ой вариант
Дам 100 баллов

Answer 1

1.

2.5 * 2^4 - 7^2 = 5*8-49=-9

2.

x^7*x^5=x^(7+5)=x^12

x^7:x^5=x^(7-5)=x^2

(x^7)^5=x^(7*5)=x^35

(x^3)^5*x^4/x^18=x^19/x^18=x

3.

-4m^3*n^5*2n^2*m^4=-8m^7*n^7

(-3m^7n^2)^4=81m^28n^8

4.

3x^2-5x+15

5.

3^10*27^3/9^9=3^19/3^18=3

(16/3)^7*(3/16)^8=3/16

6.

-4x^9y^19

7.

4m^4-15m^2n + n^2

8.

7n+19-3-5n=2n+16=2(n+8) всегда четно при натуральных n

9.

-12m^4n=-4(3m^4n)=-4*-2=8

3m^8n^2=(3m^4n)^2/3=4/3