Question

решите логарифмы----

Answer 1

log3(x+y+1) = 2
log3(x+y+1) = log3(x+y+1)^2
x+y+1= x^2 + y^2 + 1 + 2xy + 2x + 2y
x^2 + y^2 + 1 + 2xy + 2x + 2y - x - y - 1 = 0
x^2 + y^2 + 2xy + x + y = 0

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