Jow Forums literacy test

High school geometry/trig isn't the best indicator of intelligence...

5,5

that's easy
r = 10

Aye but is a good brainlet identifier

Using foil in reverse I get 10 or 2, but I've never seen someone get an answer like "n +/- x". What method gives an answer like that? From the last equation?

>r^2 - 12r + 20 = 0

That one being the "last equation"

R=10

Oh boy, i miss math, i knew I should have done engineering.

there is a rule you learn in 8th grade or so
if you have
x^2 + px + q = 0
the two solutions are
x = -p/2 +/- sqrt[(p/2)^2 - q]

Thanks

I made it through calc 2 and I've never seen it done like that.

If you had:
2x^2 + px + q = 0

Would it then be:
2x = -p/2 +/- sqrt[(p/2)^2 - q]
?