Question

Выражения: 6р(5р"2" +р) + 15р "2"(2-р) 2у(у "2"-х) - 2х(х"2" -у) 5а"4" -8а"3"(а-3) +(а"2" + 5а) 5а"2" -12,5 у + (-у"3" +2у"2" -5) ( -2,5 у) - 2,5 у у"3"

Answer 1

$6p(5p^2+p)+15p^2(2-p)=30p^3+6p^2+30p^2-15p^3= \\\ =15p^3+36p^2 \\\ \\\ 2y(y^2-x)-2x(x^2-y)=2y^3-2xy-2x^3+2xy=2y^3-2x^3 \\\ \\\ 5a^4-8a^3(a-3)+(a^2+5a)5a^2=5a^4-8a^4+24a^3+5a^4+25a^3 \\\ =2a^4+49a^3 \\\ \\\ -12,5y+(-y^3+2y^2-5)(-2,5y)-2,5y*y^3= \\\ =-12,5y+2,5y^4-5y^3-12,5y-2,5y^4=-5y^3$

Answer 2

1)30р(3)+6р(2)+30р(2)-15р(3)=15р(3)+36р(2)

2у(3)-2ху-2х(3)+2ху=2у(3)-2х(3)

5а(4)-8а(4)+24а(3)+5а(4)+25а(3)=2а(4)+49а(3)

-12,5у+2,5у(4)-5у(3)+12,5у-2,5у(4)= -5у(3)