2^x+2^(x+3)=9 3^(2x)-4*3^x+3=0

Question

2^x+2^(x+3)=9
3^(2x)-4*3^x+3=0

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Answer 1

1
2^x*(1+8)=9
9*26x=9
2^x=9:9
2^x=1
x=0
2
3^x=a
a²-4a+3=0
a1+a2=4 U a18a2=3
a1=1⇒36x=1⇒x=0
a2=3⇒3^x=3⇒x=1