(2I + 3m) 2 - (2I - 3m) 2=
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1
Answer:
24 ×2-18×2=
48-36=12 is ans
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Answer:
2l×2 + 3m×2 - 2l×2 + 3m×2 = 4l + 6m - 4l + 6m
6m + 6m = 12m
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