3. Using identity, evaluate: 712
Answers
Answered by
7
Answer:
700 +10+2
Step-by-step explanation:
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Answered by
5
Answer:
71
2
=(70+1)
2
=(70)
2
+1
2
+2(70)(1) ∵[(a+b)
2
=a
2
+b
2
+2ab]
=4900+1+140
=5041
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