Question

(x-2)的二次方减去二又四分之一等于o,怎么求x

Answer 1

(x-2)^2-9/4=0

(x-2)^2=9/4

(x-2)=3/2 或(x-2)=-3/2

x=2+3/2=7/2

或x=2-3/2=1/2