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Math Doubt...

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forkasha:
yes it is can u help me with it

yinyang:
first of all you need to know a technique

(a+b)2= a2+2*a*b+b2

by applying this technique, notice that the second value is a hint
so by looking at 4x you can make out the "a and b" values, which are a=x and b=2

so you have (x+2)2 when you expand it you have +4 instead of -8
so add a -12, the final form will become (x+2)2-12

p=2 and q=-12

astarmathsandphysics:
P=4/2 q=-8-2^2=-12

forkasha:
aster can u explain more
 ;D

forkasha:

--- Quote from: yac_belga on May 06, 2009, 08:20:08 am ---first of all you need to know a technique

(a+b)2= a2+2*a*b+b2

by applying this technique, notice that the second value is a hint
so by looking at 4x you can make out the "a and b" values, which are a=x and b=2

so you have (x+2)2 when you expand it you have a +4 instead of -8
so add a -12, the final form will become (x+2)2-12

p=2 and q=-12



--- End quote ---
first of all thanks for answering(yac_belga)+1 rep
but when i solved it i applied this rule but it didn't work
first i changed (X+p)2+q   to :
                                                         x2+2xp+p2+q
then wat

 

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