Question

一元二次方程化简 my(y-1)=ny(y+1)+2化为一般形式

答案为y^2-y-2=0 要求过程详细

Answer 1

my(y-1)=ny(y+1)+2
my² - my = ny² + ny + 2
my² - ny² - my - ny - 2 = 0
(m - n)y² - (m -n)y - 2 = 0
如果答案为y^2-y-2=0
题目应该有 m-n=1的前提条件。

Answer 2

my^2-my=ny^2+ny+2
my^2-ny^2-my-ny-2=0
∴(m-n)y^2 -(m+n)y-2=0

Answer 3

my^2-my=ny^2+ny+2
(m-n)y^2-(m+n)y-2=0
答案应该是这个啊