Question

Розвьяжите уровнение log9(x^2-2)=log9(3x+2)

Answer 1

$log9(x^2-2)=log9(3x+2)\x^2-2=3x+2\x^2-2-3x-2=0\x^2-4-3x=0\x^2+x-4x-4=0\x(x+1)-4(x+1)=0\(x+1)(x-4)=0\x+1=0(ODZ)\x-4=0\x=4$

Answer 2

Благодерен!))