Qualification > Math
math doubts [NEW]
Ghost Of Highbury:
the question says....."Express 6x-x2 in the form a-(x-b)2"...
if the answer is (x+3)2 -9 ...it simplifies to x2 + 6x + 9 -9 = x2 + 6x
but the question says that it shud be -x2 + 6x
for this the answer should be...
9 - (x-3)2 which simplifies to 9 - (x2 - 6x + 9)
==> 9 - x2 + 6x - 9 = -x2 + 6x
???
nid404:
--- Quote from: eddie_adi619 on September 27, 2009, 07:20:05 am ---the question says....."Express 6x-x2 in the form a-(x-b)2"...
if the answer is (x+3)2 -9 ...it simplifies to x2 + 6x + 9 -9 = x2 + 6x
but the question says that it shud be -x2 + 6x
for this the answer should be...
9 - (x-3)2 which simplifies to 9 - (x2 - 6x + 9)
==> 9 - x2 + 6x - 9 = -x2 + 6x
???
--- End quote ---
yeah right.....the question says 6x-x2...
yup ur right...infact it says express it in the form c-(a+b)2
Ghost Of Highbury:
it says express it in the form of a - (x-b)^2
9 - (x-3)^2
therefore a = 9
b = 3
nid404:
--- Quote from: eddie_adi619 on September 27, 2009, 07:38:06 am ---it says express it in the form of a - (x-b)^2
9 - (x-3)^2
therefore a = 9
b = 3
--- End quote ---
whatever...it just says express it in that form :P
Ur right
Ghost Of Highbury:
yah...try the mininimum point wala q..i'm not gettingd answer for that....
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