simplify (12.9)^2 -(7.1)^2
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Answered by
10
Step-by-step explanation:
= (129/10)^2-(71/10)^2
See nxt in uploaded image..
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Answered by
2
Answer:
116
Step-by-step explanation:
(12.9+7.1)(12.9-7.1) according to formula (a^2-b^2)=(a+b)(a-b)
20*5.8=116
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