Question

Daca 4x+8/3=48/x+2, atunci valorile reale ale lui x sunt....
va roog e urgeent

Answer 1

48•3=(4x+8)(x+2)
144=4x²+8x+8x+16
144=4x²+16x+16
4x²+16x+16-144=0
4x²+16x-128=0
a=4
b=16
c=-128
∆=b²-4ac=16²-4•4•(-128)=256+2048=2304 => √∆=48
x1=-b-√∆ /2a=-16-48/8=-64/8=-8
x2=-b+√∆ /2a=-16+48/8=32/8=4