Find the square root of following numbers without actual multiplication.
i] 39
ii] 42
Answers
Answered by
2
Answer:
Hello There,
This is your answer.
Step-by-step explanation:
39^2 = 39 × 39
= ( 30 + 9 ) × ( 30 + 9 )
= 30 ( 30 + 9 ) + 9 ( 30 + 9 )
= 30 × 30 + ( 30 × 9 ) + ( 9 × 30 ) + 9 × 9
= 900 + 270 + 270 + 81
= 1521
42^2 = 42 × 42
= ( 40 + 2 ) × ( 40 + 2 )
= 40 × ( 40 + 2 ) + 2 × ( 40 + 2 )
= 1600 + 80 + 80 + 4
= 1764
HOPE IT HELPS YOU!!!
HAVE A GREAT DAY AHEAD!!!
Answered by
22
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Square of 39 :
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Square of 42 :
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