) If A-
5
satisfies the equation
x²
+ 4x-p =0 then find p
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2
Step-by-step explanation:
A=[
−8
2
5
4
]
A
2
=[
−8
2
5
4
][
−8
2
5
4
]=[
64+10
−16+8
−40+20
10+16
]=[
74
−8
−20
26
]
4A=[
−32
8
20
16
]
P=x
2
+4x and A satisfies this equation
So,P=[
74
−8
−20
26
]+[
−32
8
20
16
]
=[
42
0
0
42
]
=42[
1
0
0
1
]
=42I
=42
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