Answer:

1.) -8

alternative forms

-2³

solving steps:

x = 3

substitute –> y = 7 into

z = 4

x2 - (2y + z - 4)

____________

2.) -35

solving steps:

x = 3

substitute –> y = 7 into

z = 4

x - x3 - 4x - (2x - 11) :

3 - 3 x 3 - 4 x 3 (2 x 3 + 11)

sana makatulong:)