- #1

lovemake1

- 149

- 1

## Homework Statement

1] l x + y l < or equal to l x l + l y l

## Homework Equations

x^2 + 2xy + y^2

## The Attempt at a Solution

Left side. i Squared left side to begin with, and i got x^2 + 2xy + y^2 and also did the same for the right side, but it would have absolute sign between each variable.

x^2 + 2xy + y^2 < or equal to lxl^2 + 2lxllyl + lyl^2

so its just (x + y)^2 < or equal to ( lxl+lyl )^2

not sure what I am supppose to do next..

it just seems like I am doing somethign and undoing something without any purpose.

can anyone clear this from my head?