or Java class?

Data Structures

I actually have a Java developer certificate but it was a long time ago so I have to relearn everything

Got it same time as I graduated high school

when I took that class we used C

1999 😉

Java was its own class back then - the OOP class

I had to take a 3 part Java series to get into this class

It was part of my certificate

nice

it's a good line of work

I need help factoring a math problem @here

-x^2 + 5x + 14

(-x - 2)(x - 7)

I have meeting in 3 mins

but that is close

@Warren H What class is that for?

Have you been taught any particular methods for factoring?

@Jacob it's for college learning support math

Not really all I've learned is the "what adds to give us the middle term and multiplies to give us the third term

Okay, well first try writing out this (-x )(x ), think of a few number that multiply to form 14, and see which of those can be added or subtracted to form 5

In this case, 7*2 is 14, and 7-2 is 5. So, you put the 7 and the 2 in those parentheses and change the signs as needed.

Okay

(-x + 7)(x - 2) would create a negative 14, so, although that would work for the 5x, it wouldn't work for the 14. So the right answer is the one Paradigm Slide gave.

Honestly, this is largely just process of elimination, unless someone knows a better way

So before that wouldnt you write it as
-x^2+7x-2x+14? Factor out the -x, but then what happens to the x attached to the 7 and 2?

-x(-x+7)(x-2)(x+14) ?

It would be written out as -x^2-2x+7x-14

@Warren H so if you have (-x-a)(x-b) for some a,b then a*b = 14 and b-a = 5. The solution from inspection is a = 2 and b=7.

@ThisIsChris i imagined completing the square to be something different. iirc completeing the square is transforming a quadratic into the form (ax+b)^2+c

@YourFundamentalTheorum you're right my bad

If any of you nibbas need help with Econ or Statistics Im your guy.

Or business stuff in general.

@Sam Anderson <@&387091385075105804> role'd

<@&387091385075105804> Is anyone who is good that statistics online?

This isn't homework help, I just need to check the math on something and thought that this would be the best place to ask

I'm okay at stats. What's the question?

26% of the US population are immigrants and their children. A typical successful technology startup has 2.09 cofounders. Based on this data alone, how many of these companies would we expect to be founded or co-founded by immigrants or their children? Is it just 26*2.09?

I'm trying to refute the argument that immigrants are uniquely innovative because around 40% of Fortune 500 companies were founded or co-founded by an immigrant

This is outside my wheelhouse as far as stats go. I can say that the term "immigrants" is far to vague to make assumptions from.

I get what you're trying to do, I just don't think you have enough data right now