Answer
Part A = -15
Part 5 = -20
Work Step by Step
PART A
|-3 6|
|2 1|
a=-3
b=6
c=2
d=1
(-3)(1)-(6)(2)
-3-12
-15
PART B
|4 5|
|0 -5|
a=4
b=5
c=0
d=-5
(4)(-5)-(5)(0)
-20-0
-20
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