Question

Acest exercițiu. Vă mulțumesc pentru ajutor!​

Answer 1

√(5+x)-³√(x+1)=2

[-³√(x+1)]³=[2-√(5+x)]³

-(x+1)=8+12√(5+x)+3×2(5+x)-√(5+x)³

-x-1=38-12√(5+x)+6x+(-5-x)√(5+x)

-7x-39=-√(5+x)(17+x)

...... .

49x²+546x+1521=(5+x)(17+x)²

10x²+87x+76-x³=0

(x+1)(x²-11x-76)=0

.....

x1,2=(11±5√17)/2. x3=-1

suma=11×2/2+5√17/2-5√17/2-1=10 e)