Example1. Convert the given equation `x^2+6x+9` into perfect square form
Solution:
`x^2+6x+9`
`=1 (x^2+6x+9)`
The coefficient of the x is `6`, so now we divide this by 2 : `(6 -: 2 = 3)`
and square it `(3)^2=9`. So we add and subtract `9`
`=1( x + 3 )^2`
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