Question

factorise 27x^2-1/3​

Answer 1

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27x^2 - 1/3

=> (9√3x)^2 - (1/√3)^2

=> (9√3x - 1/√3)(9√3+1/√3)

=> [(27x-1)/√3] × [(27x+1)/√3]

=> (1/3)(27x-1)(27x+1)

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