Question

1.Daca x=12×6-68, valoarea produsului p=(24-x)×(16+x)×(x+2) va fi:
2. Dati factor comun in urmatoarele expresii:
a) 5•x+17•x
b) 6•a-18•b
c) 3•a+18•b-12•c
3. Daca x+y+z=17, calculati:
a) 5•x+5•y+5•z
b) 13•x+13•y+13•z-1313
c) 882-3•(7•x+7•y+7•z)

Answer 1

x=12*6-68=72-68=4
p=(24-4)*(16+4)*(4+2)=20*20*6=400*6=2400

2.
5x+17x=22x
6a-18b=6(a-3b)
3a+18b-12c=3(a+6b-4c)

5(x+y+z)=5*17=85
13(x+y+z)-1313=13*17=221-1313=-1092
882-3*7(x+y+z)=882-21*17=882-357=525