Question

27x²(y-1)-9x³(1-y)
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Answer 1

27x²(y - 1) - 9x³(1 - y)

= 27x²(y - 1) + 9x³(y - 1)

= (27x² + 9x³)(y - 1)

= 9x²(3 + x)(y - 1)

Answer 2

\(27x^2\left(y-1\right)-9x^3\left(1-y\right)=27x^2\left(y-1\right)+9x^3\left(y-1\right)=\left(y-1\right)\left(27x^2-9x^3\right)=9x^2\left(y-1\right)\left(3-x\right)\)