Question

the answer key does not show negatives in my solution but i have two of them. some someone please point out to me my mistakes
3xsquared=5x+4 use the quadratic formula

Answer 1

I ended up with

Answer 2

put everything to one side

3x^2 -5x -4 = 0

then use the quad formula

Answer 3

I did negative 3x squared instead of the =5x and -4

Answer 4

is that not okay?

Answer 5

you have a negative in the top and bottom, so you can write it as
\[ (5 \pm \sqrt{73})/6 \]

Answer 6

it should come out the same regardless

Answer 7

the important thing is that you ahve everything to one side before pluging in

Answer 8

i did that

Answer 9

notice that you can factor out a negative from top and bottom

Answer 10

-/- = +

Answer 11

so you did it correctly, except for simplifying it a little bit by multiplying top and bottom by -1.

Answer 12

\[\frac{-5\pm\sqrt{...}}{-6}=\frac{-1}{-1}\frac{5\pm\sqrt{...}}{6}=\frac{5\pm\sqrt{...}}{6}\]

Answer 13

and that wont effect 73?

Answer 14

it changes +/- to -/+ but that is the same thing

Answer 15

um, no; if anthng the +- goes to -+

Answer 16

lol .... i gots me a mind reader ;)

Answer 17

lol ok

Answer 18

thank you

Answer 19

yep. good luck from all of us