if the problem only said -(√x - √y), you're right, because that says -1 * (√x - √y), which is (-√x + √y).but it's -(√x - √y)2, which evaluates to -(x - 2√xy + y), or (-x + 2√xy - y).
so the problem is actually (√x + √y)2 - (√x - √y)2 by the looks?(x + 2√xy + y) - (x - 2√xy + y) = (x + 2√xy + y) + (-x + 2√xy - y) = 4√xy
Do all of you americans have math in spanish after 5th grade?
(√x - √y)^2 - (√x - √y)^2
I love seeing topics like this and just thinking "damn this is just something people expect me to know nowadays." Kind of like how you should just know simple adding and subtracting.
How does Maduro treat you?
Lol, the only propaganda we get here is that the US is evil and the brits like to steal our terrain. Other than that, we know the truth on the rest of the countries and government propaganda is censored or not shown in private media.