(x+4)²-18=3x(x+2)怎么算

问题描述:

(x+4)²-18=3x(x+2)怎么算

(x+4)²-18=3x(x+2)
x^2+8x+16-18=3x^2+6x
-2x^2+2x-2=0
x^2-x+1=0
△=(-1)²-4x1x1
=1-4
=-3<0
所以原方程无实数解