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Tuesday, May 02, 2006

hi again, guys ..
does anyone here , knows how to do this question below in red:
(x-y)2=1 and 4xy=15, find the value of (2x-3y)2-5y2

incase you guys doesn't know what i'm talking about,
let me re-write the question once again in longer term .

(x-y)(x+y)= 1 and 4xy= 15 , find the value of (2x+3y)(2x-3y)- 5(y)(y) .

the answer is -11 .
but , i doesn't know the steps for it .
if any math experts know the steps for the question above ,
kindly post on the tagboard ,
thanks gratefully .

shu rou was here.

*sorry , as just now i typed something wrongly .
please re-view the question once again .
The wrong part are in green ,
question are in red .
thanks for your patience for reading .

5:53 pm