1st, pluck in the (6,0) in the equation y = px^2 + qx,0 = 36p + 6q 0 = 6p + q ... (1)then, complete the square of the equation,y = p(x^2 + qx/p) = p[x^2 + qx/p + (q/2p)^2 - (q/2p)^2] = p[(x + qx/2p)^2 - (q/2p)^2] = p(x + qx/2p)^2 - p(q/2p)^2p(q/2p)^2 = -12 -q^2/4p = -12q^2 = 48p ... (2)From (1)q = -6p ... (3)Pluck in (3) into (2)36p^2 = 48p36p^2 - 48p = 012p(3p - 4) = 0so, p = 0 or p = 4/3pluck in p = 4/3 into (3)q = -8Any question?
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Good then, study hard and good luck!
chai...pening kepala ah!
Haha it's ok ganbadei lah!
今天的add math&chemi都不会做啊~~
Haha it's ok lah, just study hard and concentrate on others subject! Add oil!
HAHAHA
Huh!? Which Kong are you? And What is so funny? Haha
么水哦？？
1st, pluck in the (6,0) in the equation y = px^2 + qx,
ReplyDelete0 = 36p + 6q
0 = 6p + q ... (1)
then, complete the square of the equation,
y = p(x^2 + qx/p)
= p[x^2 + qx/p + (q/2p)^2 - (q/2p)^2]
= p[(x + qx/2p)^2 - (q/2p)^2]
= p(x + qx/2p)^2 - p(q/2p)^2
p(q/2p)^2 = -12
-q^2/4p = -12
q^2 = 48p ... (2)
From (1)
q = -6p ... (3)
Pluck in (3) into (2)
36p^2 = 48p
36p^2 - 48p = 0
12p(3p - 4) = 0
so, p = 0 or p = 4/3
pluck in p = 4/3 into (3)
q = -8
Any question?
This comment has been removed by the author.
ReplyDeleteGood then, study hard and good luck!
ReplyDeletechai...pening kepala ah!
ReplyDeleteHaha it's ok ganbadei lah!
ReplyDelete今天的add math&chemi都不会做啊~~
ReplyDeleteHaha it's ok lah, just study hard and concentrate on others subject! Add oil!
ReplyDeleteHAHAHA
ReplyDeleteHuh!? Which Kong are you? And What is so funny? Haha
ReplyDelete么水哦？？
ReplyDelete