math
posted by kori .
f(x)=4x^2 simplify completly. Use difference quotient.

( x  2 ) ( x + 2 ) =
x ^ 2  2 x + 2 x  4 =
x ^ 2  4 =
 ( x ^ 2  4 ) =
4  x ^ 2
So :
4  x ^ 2 =  ( x  2 ) ( x + 2 )
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