Math, asked by sudarsanantj, 3 months ago

if 21square =400+40+k,find k.

Answers

Answered by Anonymous

2

Answer:

21^2=441

now

441=400+40+k

441-440=k

k=1

Answered by TheOncomingStorm

1

Answer:

1

Step-by-step explanation:

21²=400+40+k

441=440+k

441-440=k

1=k

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