Question

3道一元二次方程,1】2x^2=3x2】（x+1）^2=43】x^2-2x-4=0

Answer 1

1】2x^2=3x

2x^2-3x=0

x(2x-3)=0

x=0 或x=3/2

2】（x+1）^2=4

x+1=±2

x=-3或x=1

3】x^2-2x-4=0

x^2-2x=4

(x-1)^2=5

x-1=±根号5

x=1+根号5 或x=1-根号5