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Algebraic Identity (a-b)^3

1.052-0.952=-

Question

${(1.05)}^{2} - {(0.95)}^{2} =$ ___

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Solution

Using the identity
${(a)}^{2} - {(b)}^{2}$ $= (a + b) (a - b)$ ,
${(1.05)}^{2} - {(0.95)}^{2}$
$= (1.05 + 0.95) (1.05 - 0.95)$
$= (2) (0.1) = 0.2$

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Evaluate:
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