# Maths

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*I'm a bit confused with this qn*
Expand and Simplify 3(3x-y)^2

• Maths -

3(3x-y)^2
= 3(3x-y)(3x-y)= 3(9x^2 - 3xy - 3xy + y^2)
= 27x^2 - 18xy + 3y^2

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