Answer:
L.H.S
= (3lmn + 4ml)² - 48l²nm²
= (3lmn)² + 2(3lmn)(4ml) + (4ml)² - 48l²nm²
= 9l²m²n² + 24l²nm² + 16m²l² - 48l²nm²
= 9l²m²n² - 24l²nm² + 16m²l²
= (3lmn)² - 2(3lmn)(4ml) + (4ml)²
= (3lmn - 4ml)²
= R.H.S
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Verified answer
Answer:
L.H.S
= (3lmn + 4ml)² - 48l²nm²
= (3lmn)² + 2(3lmn)(4ml) + (4ml)² - 48l²nm²
= 9l²m²n² + 24l²nm² + 16m²l² - 48l²nm²
= 9l²m²n² - 24l²nm² + 16m²l²
= (3lmn)² - 2(3lmn)(4ml) + (4ml)²
= (3lmn - 4ml)²
= R.H.S