Find the square of the following numbers without actual multiplication a) 509 b) 211 pls step by step fast
Answers
Answered by
7
Answer:
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Step-by-step explanation:
1. 2,59,081
2.44,521
Answered by
3
Answer:
(a) 259081 (b) 44521
Step-by-step explanation:
(500 + 9)^2
= 500^2 + (2x500x9) + 9^2 [(a+b)^2 = a^2 + 2ab + b^2]
= 250000 + 9000 + 81
= 259081
(200 + 11)^2
= 200^2 + (2x200x11) + 11^2 [(a+b)^2 = a^2 + 2ab + b^2]
= 40000 + 4400 + 121
= 44521
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