Question

HELP! this is trinomial 16v^2+8v-35 prime? I think it is.

Answer 1

Can someone please help?!

Answer 2

@Mertsj can you give me some guidance here please?

Answer 3

Multiply 16 by -35

Answer 4

Did you get -560?

Answer 5

yes

Answer 6

Now try to find factors of -560 that add to 8

Answer 7

They can't be too far apart so I would start with some bigger numbers.

Answer 8

that doesnt even sound possible tho.

Answer 9

Well then let's just get started. 560 = 8x70=8x2x35=8x2x7x5

Answer 10

oh! I did that, but I didnt know if i was doing it right.

Answer 11

28 and -20 I guess

Answer 12

So now we have:
\[16v^2+28x-20x-35\]

Answer 13

Now factor by grouping

Answer 14

of course!!!

Answer 15

but how does that give me 35? sigh!