Question

Pliss bantu yah!!!!!!!!

Answer 1

(y³ + y² + y - 1) - 3(1 - y - y² - y³)
= y³ + 3y³ + y² + 3y² + y + 3y - 1 - 3
= 4y³ + 4y² + 4y - 4
= 4(y³ + y² + y - 1) (c)

Answer 2

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