Question

Solve, using the quadratic formula: 2x2 = -4x - 5

Answer 1

set it into ax^2+bx+c=0 and then use the quadratic formula :)

Answer 2

ah! I understand that, it's the quadratic formula part that is giving me trouble! :(

Answer 3

ahh do you know it?

Answer 4

yes! -b +/- sqrt(b^2 -4ac) over 2a, it's just very difficult for me to put into use!

Answer 5

okay, well plug all your numbers in.

Answer 6

dont do any of the math just plug them in.

Answer 7

x = -2+/- sqrt(4^2 - 4(2)(5) over 2(2)
right?

Answer 8

yupp! so then we would have -2+-sqrt16-40/4
reduce more(under the square root to get -24

Answer 9

but you can't square root 24 without getting a crazy number! and the options aren't decimals :/

Answer 10

this question is messed up im sorry D:

Answer 11

it's okay! maybe i will ask my teacher!

Answer 12

that would be a good idea! because you would have to have a negative or use an "i" but i dont think you have learned that yet!