Dane wyrażenie doprowadz do najprostrzej postaci.
3[(1/2x + y)²-(y-1/2x)²]-(5x-2y) =
= 3[(1/4x²+xy+y²)-(y²-xy+1/4x²)-5x+2y =
= 3[ 1/4x²+xy+y²-y²+xy-1/4x²] -5x+2y =
= 3[2xy]-5x+2y =
=6xy-5x+2y
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3[(1/2x + y)²-(y-1/2x)²]-(5x-2y) =
= 3[(1/4x²+xy+y²)-(y²-xy+1/4x²)-5x+2y =
= 3[ 1/4x²+xy+y²-y²+xy-1/4x²] -5x+2y =
= 3[2xy]-5x+2y =
=6xy-5x+2y