Question

I need help with the top one

Answer 1

2. 14

4. -6

Explanation:

#2

(x²-4y)/2, given x=4, y=-3

[(4)²-4(-3)]/2

=[16+12]/2

=28/2

=14

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#4

19-x², given x=-5

19-(-5)²

=19-25

=-6