Question

[tran dinh duc]

TINH GIA TRI BIEU THUC 

3 * M + 5 * N + 2 * M + N + M      VOI M+ N = 25

Answer 1

[thánh nô]

3 x M + 5 x N + 2 x M + N  + M

= M x ( 2 + 3 ) + 5 x N + ( M + N )

= 5 x M + 5 x N + ( M + N )

= 5 x ( M + N ) + ( M + N )

= ( M + N ) x ( 5 + 1 )

= ( M + N ) x 6

= 25 x 6 

= 150