Question

Решите неравенство (x-3)(x+3)>x^2+5x-4

Answer 1

(x-3)(x+3)>x²+5x-4
х²-9>x²+5x-4
x²-x²-5x>9-4
-5x>5
x<5:(-5)
x<-1

х∈(-∞;-1)