Question

Factorise: 1) 49-81y² 2) a²b²-4 3) 4)x²-y² 5) 16x²y²-9z² 6) 16-25a²b²​

Answer 1

Answer:

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Step-by-step explanation:

i just need pointsi just need pointsi just need pointsi just need pointsi just need pointsi just need pointsi just need pointsi just need pointsi just need pointsi just need pointsi just need pointsi just need pointsi just need pointsi just need pointsi just need pointsi just need pointsi just need pointsi just need pointsi just need pointsi just need pointsi just need pointsi just need pointsi just need pointsi just need pointsi just need pointsi just need pointsi just need pointsi just∧∧∧just need pointsi just need pointsi just need pointsi just need pointsi just need pointsi just need pointsi just need pointsi just need pointsi just need pointsi just need pointsi just need pointsi just need pointsi just need pointsi just need pointsi just need pointsi just need pointsi just need pointsi just need pointsi just need pointsi just need pointsi just need pointsi just need pointsi just need pointsi just need pointsi just need pointsi just need points