Question

HELP

Answer 1

something vanished from step 5 to step 6. do u see it?

Answer 2

yes so which one do you think it is? @helder_edwin

Answer 3

i think i just gave u the answer

Answer 4

im thinking b but im not sure

Answer 5

what vanished from the equation? from step 5 to step 6?

Answer 6

The x+b over 2a @helder_edwin

Answer 7

no. look carefully the right side of the equation

Answer 8

ooooo i see it c/a is written the wrong way

Answer 9

yes. the sign is missing. right?

Answer 10

its suppose to be -c/a

Answer 11

yes

Answer 12

thank you

Answer 13

u r welcome