Question

1.Stiind ca a=24 si b+c=70 calculati 4a+2b+2c
2.Calculati ab+ac stiind ca a=55 si b+c=120
PLZ help mee

Answer 1

1.Stiind ca a=24 si b+c=70 calculati 4a+2b+2c
4a+2b+2c=4*24+2(b+c)=96+2*70=96+140=2362.Calculati ab+ac stiind ca a=55 si b+c=120
ab+ac=?
a(b+c)=55*120=6600

Answer 2

1.  daca a=24 si b+c=70
     atunci ,  4a+2b+2c = 4*24 + 2(b+c) = 96+2*70 = 236 ;
2.  daca a=55 si b+c=120
    atunci ,   ab + ac = a*(b+c) = 55 * 120 = 6600 ;