The difference $(0.7)^{2} - (0.3)^{2}$ simplifies to

0.4

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0.04

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0.49

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0.56

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Solution

The correct option is A $0.4$
Using $a^{2} - b^{2} = (a + b) (a - b)$

$(0.7)^{2} - (0.3)^{2} = (0.7 + 0.3) (0.7 - 0.3) = 1 (0.4) = 0.4$

Hence option 'A' is correct choice.

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Similar questions

$(0.7)^{2} - (0.3)^{2}$

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