Question

9^(2√x)-4*3^(2√x)+3=0

Answer 1

令a=3^2√x

则a²-4a+3=0

(a-1)(a-3)=0

a=1,a=3

3^2√x=1=3^0

2√x=0

x=0

3^2√x=3

2√x=1

x=1/4

所以x=0,x=1/4