If $a = 5$ and $b = 7$ , then $| a - b |$ is

$- 2$

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$2$

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$5$

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$12$

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Solution

The correct option is B
$2$

If $a = 5$ and $b = 7$ , then $| a - b |$ $= | 5 - 7 | = | - 2 | = 2$
Concept : The absolute value (or modulus) | x | of a real number x is the non-negative value of x without regard to its sign.

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Similar questions

A = {5, 7}, B = {7, 5}

A

B

\frac{7 + \sqrt{5}}{7 - \sqrt{5}} - \frac{7 - \sqrt{5}}{7 + \sqrt{5}} = a + b \sqrt{5}

\frac{7 + \sqrt{5}}{7 - \sqrt{5}} - \frac{7 - \sqrt{5}}{7 + \sqrt{5}} = a + \frac{7 \sqrt{5}}{11}

\frac{\sqrt{7} - \sqrt{5}}{\sqrt{7} + \sqrt{5}} = a + b \sqrt{35}

(a - b)

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