Question

Evaluate using identity (8.7) ^2 -(1.3) ^2
Answer fast​

Answer 1

Answer:

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Step-by-step explanation:

using a² - b² = (a - b)(a + b), we get

therefore;

(8.7) ^2 -(1.3) ^2 =  (8.7-1.3)(8.7+1.3)

= (7.4)(10)

= 74