use suitable identity find 71 square
Answers
Answered by
3
Answer:
5041
Step-by-step explanation:
Identity » (a+b)² = a²+2ab+b²
(71)²
= (70+1)²
= (70)² + 2(70)(1) + (1)²
= 4900 + 140 + 1
= 5041
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