factorise: 16a^2 - 25÷ 4a^2
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4a^2-5^2÷4a^2=4a^2 will be cut by another 4a^2so answer will be 5^2
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Answered by
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Answer:
Step-by-step explanation:
= ( 4a - 5/(2a) )( 4a + 5/(2a) )
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