Find the square by suitable identity
1) 71
2) 32
Answers
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Step-by-step explanation:
We will solve these by identity (a+b)²=a²+b²+2ab
1)71²
=(70+1)²
=70²+1²+ 2×70×1
=4900+1+140
=5041
2)32²
=(30+2)²
=30²+2²+ 2×30×2
=900+4+120
=1024
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