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Question

Find the square of the following numbers.
32
35

A
1024;1225
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B
2024;1225
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C
1024;1125
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D
924;1025
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Solution

The correct option is A 1024;1225
322=(30+2)2
=30(30+2)+2(30+2)
=302+30×2+2×30+22
=900+60+60+4=1024
352=(30+5)2=30(30+5)+5(30+5)
=302+30×5+5×30+52
=900+150+150+25=1225.

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