Question

Use suitable identity , find 12.2

2 − 7.8

2

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Answer 1

Step-by-step explanation:

( 7.8 )² - ( 2.2 )². We will evaluate this, by using an identity : a² - b² = ( a + b )( a - b ). So, Here we have ,. a = 7.8 and b = 2.2. Solution ;.

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Answer 2

Answer:

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