Упростите выражение a)16x^2y* 1/8 x^3y^4 b)(2ab^3)^3*(-3a^2b)^3 в)11,3p^3k^8 * 0,6pk^5 г)(1,8m^4n)^2* 2/3mn^2

1) (6а-b)^2-(9a-b)(4a-2b)= 36a^2-12ab+b^2-36a^2+18ab+4ab-2b^2= -b^2+10ab

2) (2a-3b)^2-(3a+2b)^2=

4a^2-12ab+9b^2-9a^2-12ab-4b^2=

-5a^2+5b^2-24ab

3) (2x-3y)^2+(4x+2y)^2=

4x^2-12xy+9y^2+16x^2+16xy+4y^2=

20x^2+13y^2+4xy

4) 3x(5+x)^2-x(3x-6)^2=

75x+30x^2+3x^3-9x^3+36x^2-36x=

-6x^3+66x^2+39x

5) 0,6(ab-1)^2+1,4(ab+2)^2=

0,6a^2b^2-1,2ab-0.6+1,4a^2b^2+5,6ab+5,6=2a^2b^2+4,4ab+4,4

6) (x-2)^2+(x-1)(x+1)=

x^2-4x-4+x^2-1= -4x-5

7) (3a-2b)(3a+2b)-(a+3b)^2=

9a^2-4b^2-a^2-6ab-9b^2=

8a^2-13b^2-6ab

8) (y-4)(y+3)+(y+1)^2-(7-y)(7+y)=

y^2+3y-4y-12+y^2+2y+1-49+y^2=3y^2+y-60