Question

daca a=14 si b+c=24 calculați :2a+b+c;ab+ac+3b+3c

Answer 1

Răspuns:

Explicație pas cu pas:

2 a + b + c = 2 × 14 + 24 = 28 + 24 = 52

ab + ac + 3b + 3c = a × ( b + c ) + 3 × ( b + c ) =

                             = 14 × 24 + 3 × 24 =

                             = 336 + 72 =

                             = 408

sau:

ab + ac + 3b + 3c = a ( b + c ) + 3( b +c) = ( b +c) ( a + 3 ) = 24 x 17 = 408

Answer 2

2a+b+c=2×14+24=28+24=52

ab+ac+3b+3c=a×(b+c)+3×(b+c)=14×24 +3×24=336+72=408

14×

24

----

56

28

---------

336

Kawaiimath