Question

preciso apenas da conta !

Answer 1

a ) x - y
5 - ( - 4 )
5 + 4 = 9

b ) 3 x + a
3 × 2 + 6
6 + 6 = 12

c ) 2x + m
2 × ( - 1 ) + ( - 3 )
- 2 - 3 = - 5

d ) m - 2a
3 - 2 × ( - 5 )
3 + 10 = 13

e ) x + y
1 / 2 + ( - 1 /5 )
1/2 - 1/5 ( tirando o mmc )
5 - 2 / 10 = 3 /10

f ) a - b
3 - ( - 1/2 )
3 + 1 /2
4 / 2 = 2

g ) a^3 - 5a
( - 2 )^3 - 5 × ( - 2 )
- 8 + 10 = 2

h ) x^2 - 2y
( - 3 )^2 - 2 × 5
9 - 10 = - 1

i ) 3a^2 - b^2
3 × ( - 2 )^2 - ( - 7 )^2
3 × 4 - 49
12 - 49 = - 37

j ) 5a^2 + 3ab
5 × ( - 3 )^2 + 3 × ( - 3 ) × ( 4 )
5 × 9 - 9 × 4
45 - 36 = 9

k) a^2 + 4a
( 2 / 3 )^2 + 4 × 2/3
4/9 + 8 / 3 ( tirando o mmc)
4 + 24 / 9 = 28 / 9

Espero ter ajudado!