Question

Evidențiind factorul comun,efectuati: a) 3x12-3x2 b) 4x23+4x11 c) 7x49+7x31-7x50 d) 17x15-15x7 e) 5x18+5x2 f)9x11+30x11-11x16

Care este raspunsul? Pls.

Answer 1

Factor comun este numarul care se repeta intr-o relatie.

a) 3x12 - 3x2 = (3 se repeta, deci e factor comun)

3x(12-2) =

3x10 = 30

b) 4x23 + 4x11 =  

4x(23+11) =

4x34 = 136

c) 7x49 + 7x31 - 7x50 =
7x(49+31-50) =

7x30 = 210

d) 17x15 - 15x7 =

15x(17-7) =

15x10 = 150

e) 5x18 + 5x2 =

5x(18+2) =

5x20 = 100

f) 9x11 + 30x11 - 11x16 =

11x(9+30-16) =

11x23 = 253

Answer 2

Răspuns:

a) 3x12-3x2=3x(12+2)=3x14=42

b) 4x23+4x11=4×(23+11)=4×34=136

c) 7x49+7x31-7x50=7×(49+31-50)=7×30=210

d) 17x15-15x7=15×(17-7)=15×10=150

e) 5x18+5x2=5×(18+2)=5×20=100

f) 9x11+30x11-11x16=11×(9+30-16)=11×23=253