a³-b³-a+b factories the following equation
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a³-b³-a+b
=(a³-b³) - (a-b)
= ( a-b) ( a²+b²+ab ) - (a-b)
= ( a-b ) ( a²+b²+ab -1 )
=(a³-b³) - (a-b)
= ( a-b) ( a²+b²+ab ) - (a-b)
= ( a-b ) ( a²+b²+ab -1 )
vbajolia:
Hi,but I can't understand in this solution please show detail answer
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