Question

considere a expressão algébrica

Answer 1

Resposta:

x²y - 2xy + 4x -y

a) 1².2 - 2.1.2 + 4.1 -2

1.2 - 4 + 4 - 2

2 - 0 - 2

0

b) 2².1 - 2.2.1 + 4.2 -1

4 - 4 + 8 - 1

0 + 7

7

c) 0².1 - 2.0.1 + 4.0 -1

0 - 0 + 0 - 1

-1

d) (-2)².(-1) - 2.(-2).(-1) + 4(-2) - (-1)

4.(-1) - 4(-1) + (-8) +1

- 4 + 4 - 8 + 1

0 - 7

-7