Question

已知n是正整数，且x的3n次方=2，求（3x的3n次方）²+（-2x的2n次方）³的值

Answer 1

解：(3x^3n)^2+(-2x^2n)^3
=3×2^2-2^3× (x^3n)^2
=12-8× 4
=12-32
=-20

Answer 2

解：(3x^3n)^2+(-2x^2n)^3
=(3×2)^2-2^3× (x^3n)^2
=36-8× 4
=36-32
=4