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Expansion of (x^2 - y^2)

Four alternat...

Question

Four alternative options are given for each of the following statements. Select the correct option.

The value of (7.2)² is (use an identity to expand):

A. 49.4

B. 14.4

C. 51.84

D. 49.04

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Solution

7.2 = 7 + 0.2

Using the identity with a = 7 and b = 0.2:

Hence, the correct answer is C.

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