Question

3^2x+3^2x+2=90

Câu trc mik viết sai -_-

Answer 1

3 mũ 2x .(1+3²)=90

=>3 mũ 2x=9=>3 mũ 2x=3²

=>2x=2=>x=1

Answer 2

3^2x + 3^2x+2 = 90

=> 3^2x + 3^2x . 3² = 90

=> 3^2x . (1 + 9) = 90

=> 3^2x . 10 = 90

=> 3^2x = 9

=> 3^2x = 3²

=> 2x = 2

=> x = 1

~Std well~