Powers and Roots Practice Test 4

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Question : 23 of 40

Marks: +1, -0

If

4*5=√ 41

and

5 * 6 = 7

, then find the value of

8 * 15

.

16
$√ 14$
15
17
13

Solution:

4*5=√ 41

4*5=√ {16+25}

4*5=√ { 4^2+5^2}

So,

8 * 15=√{8^2+15^2}

=√289=17

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