Step-by-step explanation:

1.

y = x² - 3x - 18

y= (-2)² - 3(-2) - 18

y= 4+6-18

y= -8

y = x² - 3x - 18

y= (-1)² -3(-1) -18

y= 1+3-18

y= -16

y = x² - 3x - 18

y= (0)² - 3(0) - 18

y= 0-0-18

y= -18

y = x² - 3x - 18

y= (1)² - 3(1) - 18

y= 1-3-18

y= -20

y = x² - 3x - 18

y= (2)² - 3(2) - 18

y= 4-6-18

y= -20

2.

y= -x²-9x-14

y= -(1)²-9(1)-14

y= -1-9-14

y= -24

y= -x²-9x-14

y= -(2)²-9(2)-14

y= -4-18-14

y= -36

y= -x²-9x-14

y= -(3)²-9(3)-14

y= -9-27-14

y= -50

y= -x²-9x-14

y= -(4)²-9(4)-14

y= -16-36-14

y= -66

y= -x²-9x-14

y= -(5)²-9(5)-14

y=

y= -25-45-14

y= -84