Question

how to solve 4n(square) -8n-1 = 0 using the quadratic formula

Answer 1

a = 4, b = -8, and c = -1.

Then, see attachment for the formula.

Answer 2

but with the negative in front of the formula does that make the - 8 a positive?

Answer 3

so 8- Square root of ((-8)(-8) - 4(4)(-1) = 64 - (-16) = 48

Answer 4

Close. 64 - (-16) = 64 + 16. Otherwise, you were on the right track.

Answer 5

80

Answer 6

So 8 Square root of 80 divided by 2(4)

Answer 7

(8 - sqrt(80))/8 and (8+sqrt(80))/8.

Don't forget that 80 = 16*5 though, and you can factor the 16 out of the square root.

Answer 8

aaaahhhhhhhhh..... (screaming) .... ok soooo why when I put it in the calc do I get -9.88854382?

Answer 9

wait when i do the proper (( i got 2.118033 ... is that the answer?

Answer 10

Leave it in square root form. That's if you solve for the square root.

Answer 11

my brain hurts