SOLUTION: Two resistors,when connected in series,have a total resistance of 40 ohms.When connected in parallel their total resistance is 8.4 ohms.If one of the resistors has a resistance of

Question 40557: Two resistors,when connected in series,have a total resistance of 40 ohms.When connected in parallel their total resistance is 8.4 ohms.If one of the resistors has a resistance of Rx ohms:
(a) show that Rx^2-40Rx+336=0
&
(b)calculate the resistance of each.
answers ( 12 ohms,28 ohms)
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!

R = 28,12
check these values

multiply both sides by 4

multiply both sides by 21

OK
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