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ATQ, Expand (3a - 4b - 2c)² using the formula: 
On Squaring each term: (3a)2 = 9a2, (− 4b)2 =16b2, (−2c)2 = 4c2 Multiply pairs of terms: 2(3a) (−4b) = −24ab, 2(3a) (−2c) = −12ac, 2(−4b) (−2c) = 16bc On Combining everything, we get 9a ² + 16b² + 4c² – 24ab – 12ac + 16bc
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