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you posted this question earlier

Im pretty sure it was involving different equations

Yes I am with ya

Now move 80 to the other side
and you get 4y^2+4y-80=0
Then factor

thats where I get confused because what adds to get 4 but multiplies to get -80???

thats a lot cleaner and easier to deal with

now what

Well, how does that factor?

IDK???

no, I bet its really easy but I just cant wrap my head around it.

5 and -4

And yeah, you got it, haha

y=-5 and y=4

-5 doesnt work when plugged in so its got to be 4

After plugging in 4 to the equation I get x=6

How does it not work?

II get x^2=0

Which just means x = 0

x^2+4(-5)^2=100
x^2+100=100
-100 -100
x^2=0
but you cannot take the square root of 0

Like how does that work?

Wait no its just (0, -5)

Okay

Currently plugging that into the first equatiom

So final answers are
(4,6)
(0,-5)
(6,4)
(-6,4)

So we actually have 3 solutions.
|dw:1433534800787:dw|
Sorry for the bad drawing, but yeah.

Makes sense

0+6-6

Correct :)

Okay cool

Mhm :3