Equation of a line

• xunmeng

  2 Jun 09, 22:52

  How to find the value of p if the lines 3x - py = 6 and 6x + 3y + 2 = 0 are parallel?

  Please advise. Thanks

• eagle

  2 Jun 09, 22:58

  parallel means same gradient

  change both to the form y = mx + c

  equate the 2 different m to find the answer :D

• xunmeng

  2 Jun 09, 23:04

  Sorry, I still don't get it. How do you equate the 2 different m together?

• dkcx

  2 Jun 09, 23:18

  Originally posted by xunmeng:

  Sorry, I still don't get it. How do you equate the 2 different m together?

  3x - py = 6
  y = (3/p)x - 6/p

  6x + 3y + 2 = 0
  y = -2x - 2/3

  Since they are parallel, gradient is the same

  3/p = -2
  p = -1.5

• ^tamago^

  2 Jun 09, 23:20

  i know who TS is liao :lol:
• xunmeng

  2 Jun 09, 23:22

  Originally posted by ^tamago^:

  i know who TS is liao

  kena sexposed liao

• xunmeng

  2 Jun 09, 23:23

  ok thanks! got the answer!

• ^tamago^

  2 Jun 09, 23:26

  ???
• dkcx

  3 Jun 09, 00:25

  Originally posted by ^tamago^:

  i know who TS is liao

  U know him?

  Base on his previous post, a NP student but asking questions of O's standard. Teaching tuition?