求不等式x平方+2>3x

问题描述:

求不等式x平方+2>3x

x^2+2>3x
x^2-3x+2>0
(x-2)(x-1)>0
解得:
x>2或x

x²-3x+2=(x-1)(x-2)>0
x>2或者x<1

x2

x²+2>3x
x²-3x+2>0
(x-2)(x-1)>0
则:x>2或x

x平方+2>3x
x²-3x+2>0
(x-2)(x-1)>0
所以解集是
x>2或x<1

x平方+2>3x
=x^2+2-3x>0
(x-1)(x+3)>0
x2