Question

Solve:
5 = 4r(2r + 3)

is the answer -3 ±√ 19
4

Answer 1

5=8r squared + 12r

Answer 2

do u need the working?????

Answer 3

wait how did you get that?

Answer 4

yes if my answer is wrong

Answer 5

5=8r^2 + 12r
or
8r^2 + 12r - 5 = 0

then use quadratic formula

u get
- 12 +/- 4r00t19
r = ----------------
16

simplify to get the two roots

Answer 6

- 3 + root19 - 3 - root19
r = ------------ and -------------
4 4

Answer 7

so i was right !! thanks

Answer 8

so I guess u had done it right....

Answer 9

thanks i was a lil worried when they said it was 5r=8srt12

Answer 10

oh, he had just resolved the bracket and did not proceed any further......

Answer 11

Thank You So Much ... I mean I know how to do them for the most part i just need someone to help check my answers

Answer 12

u r welcome