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CBSE Class 12 Math 2023 Delhi Set 1 Solved Paper

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Question : 4
Total: 38
If A=[
10
21
],B=[
x0
11
] and A=B2, then x equals:
Solution:     👈: Video Solution
A‌=B2
‌[
10
21
]‌=[
x0
11
][
x0
11
]
∴‌‌‌[
10
21
]‌=[
x20
x+11
]
∴‌x2‌=1‌ and ‌x+1=2
∴‌‌‌x‌=±1
‌x‌=1
Hence x=1
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