(x-y)^2 ? im not sure of the poistive/negative signs?

5 ⤊

2006-09-13 11:17:54 · 5 answers · asked by J' K '06 1 in Science & Mathematics ➔ Mathematics

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

2006-09-13 11:19:45 · answer #1 · answered by MsMath 7 · 2⤊ 1⤋

this is x minus y. times y squared

2006-09-13 11:30:03 · answer #2 · answered by thamal3 1 · 0⤊ 0⤋

(x-y)^2

(x-y)(x-y)

x^2+y^2-2xy

2006-09-13 11:23:51 · answer #3 · answered by sley 2 · 2⤊ 1⤋

always positive

2006-09-13 11:19:19 · answer #4 · answered by nirvana 2 · 0⤊ 1⤋

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

2006-09-13 11:26:56 · answer #5 · answered by rhino9joe 5 · 1⤊ 0⤋