Respuesta :

27x² and 81x⁵

81 = 27*3
x⁵ = x²x³

81x⁵ = 27*3*x²x³= (27x²)*3x³

We can see that 81x⁵=(27x²)*3x³ includes as a factor 27x²,
so GCF is 27x².