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Stefiloove
a fost răspuns

2x+a la puterea a doua+ab+ac=60
a=4
b+c=8

Răspuns :

StefaniaStoica
[tex]x+ a^{2} + ab+ ac= 60 \\ x+ a^{2} + a (b+c)=60 \\ x+ 4^{2} +4( b+c)=60 \\ x+16+4X8=60 \\ x+16+32=60 \\ x+48=60 \\ x=60-48 \\ x=12[/tex]