(x平方-x)平方-5x平方+5x-6=0解方程,
问题描述:
(x平方-x)平方-5x平方+5x-6=0解方程,
答
(x² - x)²- 5x² + 5x - 6 = 0(x² - x)²- 5(x² - x) - 6 = 0(x² - x + 1)(x² - x - 6) = 0因为x² - x + 1 = (x - 1/2)² + 3/4 > 0所以x² - x - 6 = 0(x + 2)...