Question

resolver as expressoes numericas
a, 3+7-12-6+9
b,-17+20+7-12×2
c,-10 ÷2×7-15
resolver as expressoes algebricas
a,3x2-7x+4x2+5x
b,-12xy+5x-8xy​

Answer 1

Explicação passo-a-passo:

a)

3+7+9=19

-12-6=-18

19-18=1

b)

20+7=27

-17-12×2=-17-24=-45

27-45=-18

c)

-10÷2x7=-5×7=-35

-35-15=-50

Answer 2

Resposta:

1: (A) 1

(B) 14

(C) 15

2:

(A)45

(B)...