Is the following equation true sometimes, always, or never (x + y)^2 =x^2+ 2xy+y^2

asked Jan 25, 2017 67.8k views

5 votes

7.2k points

Please log in or register to add a comment.

7 votes

This is always true! Foil out the left side of the equation.
(x+y)(x+y)=x^2+xy+yx+y^2=x^2+2xy+y^2

Hope this helps!

Gpupo answered Jan 25, 2017

by Gpupo

8.2k points

2 votes

(x + y)^2 =
(x + y)(x + y) = x^2 + xy + xy + y^2 = x^2 + 2xy + y^2
ALWAYS TRUE :)

TJR answered Jan 29, 2017

by TJR

8.2k points

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers