若X的平方减2X等于3,则2X的立方减7X的平方减2004等于多少

x² - 2x = 3
x² - 2x - 3 = 0
(x - 3)(x + 1) = 0
x = 3 或 x = -1
2³ - 7² - 2004
当x = 3,
2(3)³ - 7(3)² - 2004
= -2013
当x = -1
2(-1)³ - 7(-1)² - 2004
= -2013