10. Factorise 16m2 – 9 with identity
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Answer:
(4m+3)(4m-3)
Step-by-step explanation:
16m² – 9
= 4²m² - 3²
= (4m)² - 3²
= (4m+3)(4m-3) ( ∵ a²-b² = (a+b)(a-b) )
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