нужно сдать сегодня,умоля
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1

1) y+y+y=3y=y*3≠y^3

2)8m=6m+2m

3)a+4b=4b+a

4)5(x-2)=5x-10≠5x-7.

2

1) 7*7*7=7^3

2)(-5)*(-5)*(-5)*(-5)*(-5)*(-5)=(-5)^6=(-1)^6*5^6=1*5^6=5^6.

3

1)a^4*a^6=a^(4+6)=a^10

2)a^6:a^2=a^(6-2)=a^4.

4

1) (0,5)*(-3)^4=0,5*81=40,5

2)4^3-5^3+(-1)^9=64-125-1=-61-1=-62.

5

1)(x^3)^5*x^6=x^3*5*x^6=x^15*x^6=x^(15+6)=x^21

2)(n^5)^4:(n^2)^3=n^5*4:n^2*3=n^20:n^6=n^(20-6)=n^14.

6

1) -0,2a^2bc*7ab^7c^10=-0,2a^3b^8c^11

2)(-(1/4)x^3y)^3=-(1/4^3)x^9y^3=-(1/64)x^9y^3.

7

3(a-b)+2(a+b-c)+b-3c=5(a-c)

3a-3b+2a+2b-2c+b-3c=5(a-c)

(3+2)a+(-3+2+1)b-(2+3)c=5(a-c)

5a+0b-5c=5(a-c)

5a-5c=5(a-c)

5(a-c)=5(a-c).

8

1)0,6x^3y*(-5xy^7)^2=0,6x^3y*25x^2y^14=15x^5y^15

2)(-(1/3)a^5b^3)^4*(9a^3b)^2=(1/3^4)a^20b^12*81a^6b^2=

=(1/81)*a^26b^12*81=a^26b^12.

9

1) 7^14=(7^2)^7=49^7>49^5

2)3^40=(3^4)^10=81^10

4^30=(4^3)^10=64^10

81^10>64^10

3^40>4^30.

10

3a^2b=5

1)15a^2b=5*3a^2b=5*5=25

2)18a^4b^2=2*3a^2b*3a^2b=2*5*5=50.

1) (ab - ac) + (yb - yc) = a(b - c) + y(b -c) = ( b - c)(a +y)
2) ( 3x + 3y) - bx - by = 3(x + y) - b(x + y) = (x+y)(3 - b)
3) (4n - 4) + ( c - nc) = 4( n - 1) + c( 1 - n) = (4 - c)(n - 1)
4) ( x⁷ + x³) - 4x⁴ - 4 = x³(x⁴ + 1) - 4( x⁴ + 1) = (x⁴+1)( x³ - 4)
5) (6mn - 3m) + ( 2n - 1) = 3m( 2n - 1) + ( 2n - 1)=(2n - 1)(3m + 1)
6) (4a⁴ - 8a) +(10y - 5ya³) = 4a(a³ - 2) + 5y(2 - a³) = (4a - 5y)(a³ - 2)
7) a²b² - a + ab² - 1 = (a²b² + ab²) - (a + 1) = ab²(a + 1) - (a+1)=(a+1)(ab² - 1)
8) (xa - xb²) + (zb² - za) - ya + yb² = x(a-b²)+z(b² -a) - y(a -b²)=(x - z - y)(a - b²)