Question

What does x² - 2xy + y² mean?

Answer 1

\[(x-y)^{2}=x ^{2}-2xy+y ^{2}\]

Answer 2

so can you type it out as (x-y) (x+y)?

Answer 3

its..

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

this is a formula..

Answer 4

so can you type it out as (x-y) (x+y)?

Answer 5

No, because\[(x-y)(x+y)=x ^{2}-y ^{2}\]

Answer 6

then does (x-y)^2 simplify to (x-y)(x-y)?

Answer 7

Yes

Answer 8

\[(x-y)^2\\=(x-y)(x-y)\\=x(x-y)-y(x-y)\\=x^2-xy-yx+y^2\\=x^2-2xy+y^2\]