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a³-b³+1+3ab. Factorise

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a³-b³+1+3ab. Factorise
  • 1 answers

Mahi 12 5 years, 2 months ago

= a³ + ( - b )³ + 1³ - 3 × a × ( - b ) × 1 = [ a+(-b)+1 ][a²+(-b)²+1²-a(-b)-(-b)1-1×a] = ( a - b + 1 ) ( a² + b² + 1 + ab + b - a )
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