If a=2, b = - 1, c = - 3 and d = - 2 find:

1/2bc-6ac+2ab

1/4 (ac) ² + 1/6ac

34

8

Step-by-step explanation:

1/2bc - 6ac + 2ab

(1/2) (-1) (-3) - (6) (2) (-3) + (2) (2) (-1)

(1/2) (4) - (-36) + (-4)

2 + 36 - 4

34

1/4 (ac) ² + 1/6ac

(1/4) [ (2) (-3) ]² + (1/6) (2) (-3)

(1/4) (-6) ² + (1/6) (-6)

(1/4) (36) + (-1)

9 - 1

8