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a fost răspuns

Rezolvați in R inecuatia :
(x+4)(x+5)-x <5

Răspuns :

Axentegabriela
X2+5x+4x+20-x<5

X2+8x+20<5 

X2+8x+20-5<0 

x2+5x+3x+15<0

x *(x+5)+3(x+5)<0

(x+3) * (x+5) <0

{x+3<0 ; x+5>0

{x+3>0 ; x+5<0

{x < -3 ; x> -5

{x > -3 ; x< -5 

x∈(-5,-3)


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