8X² + Y^m 与 -X^n + (4/9)Y³ 是同类项,
则:n = 2 且 m = 3,
所以:
0.5MN - 4M²N + 5N²M - NM² - MN/2 + MN²
= NM * (0.5 - 4M + 5N - M - 0.5 + N)
= NM * (6N - 5M)
= 2 * 3 * (6 * 2 - 5 * 3)
= 6 * (-3)
= -18
8X² + Y^m 与 -X^n + (4/9)Y³ 是同类项,
则:n = 2 且 m = 3,
所以:
0.5MN - 4M²N + 5N²M - NM² - MN/2 + MN²
= NM * (0.5 - 4M + 5N - M - 0.5 + N)
= NM * (6N - 5M)
= 2 * 3 * (6 * 2 - 5 * 3)
= 6 * (-3)
= -18