Question

A = 18 b+c = 57,a•b+a•c+7•b+7=?
Repedeeee

Answer 1

Răspuns:

• 1425

Explicație pas cu pas:

a = 18

b + c = 57

a•b + a•c + 7•b + 7·c  =

a · (b + c) + 7 · (b + c) =

(b + c) (a + 7) =

57 · 25 =

1425

Answer 2

$a = 18 \\ b + c = 57 \\ a \times b + a \times c + 7 \times b + 7 \times c = \\ a \times (b + c) + 7 \times ( b+c ) = \\ (b +c ) \times ( a+ 7) = \\ = 57 + 25 = 1425$