Question

Dacă a+b+c=13 calculați

a)3a+3b+3C=
b)13•a+13•b+13•c-169
c)10a+10b+10c-10

URGENTT DAU COROANA

Answer 1

A) 3a+3b+3c= 3x13
3a+3b+3c=29
B)13a+13b+13c=13x13
13a+13b+13c=169
13a+13b+13c-169=0
C)10a+10b+10c=10x13
10a+10b+10c=130
10a+10b+10c-10=120

Answer 2

Răspuns:

Explicație pas cu pas:

se da factor comun

a)

a+b+c=13

= 3*(a+b+c)

=3*13

=39

-

b)

=13*(a+b+c) -169

=13*13-169

= 169-169

=0

-

c)

= 10*(a+b+c) -10

= 10*13-10

= 130-10

= 120