Question

(x + y +z )² =

( x² - y² =

(x - y)³ =​

Answer 1

Answer:

1. x²+y²+z²+2xy+2yz+2zx

2. (x+y)(x-y)

3. x³+y³+3x²y+3xy²

Answer 2

Answer:

1. (x+y+z)(x+y+z)

=x^2+xy+xz+yx+y^2+yz+zx+zy+z^2

=x^2+y^2+z^2+2xy+2zx+2xz

3. (x-y)(x-y)(x-y)

=x^2-xy-yx+y^2(x-y)

=x^2-2xy+y^2(x-y)

=x^3-x^2 y-2x^2 y+2xy^2+y^2 x-y^3

=x^3+y^2-2x^2 y+2xy^2-x^2 y+y^2 x

i dont know no. 2.