5 marks question , pl z do write and very long , god apka bhala kre or m bhi 5 thanks and brainliest
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=(a-2b+3c)³
= Since, (a+b+c)³= a²+ b²+ c² + 2ab+2bc+2ac
So, (a-2b+3c)³= a²+(-2b)²+(3c)²+2×a×(-2b)+2 × (-2b) ×3c + 2×a×3c
= a² + 4b² + 9c² - 4ab - 12bc + 6ac
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