Math, asked by Anonymous, 5 months ago

please explain the question​

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Answered by vijay797
2

Answer:

D) 9

Step-by-step explanation:

x*y =

 \sqrt{ {x}^{2}  +  {y}^{2} }

1*2√2 =

 \sqrt{ {1}^{2} +  {(2 \sqrt{2} )}^{2}  }

 \sqrt{1 + (4 \times 2)}  =  \sqrt{9} = 3

1* -2√2 = 3

(1 \times 2 \sqrt{2} )(1 \times  - 2 \sqrt{2} ) = 3 \times 3 = 9

Answered by aliabidi09
3

So answer

is d 9

Step-by-step explanation:

The * operation mean you have to take square of 1 value and 2nd value separately and then have to add then as defined in the question so.

 \sqrt{ {1}^{2} + ( {2 \sqrt{2 \: )} }^{2} }  \times  \sqrt{( {1)}^{2} }  + ( {2 \sqrt{2)} }^{2}

 \sqrt{9}  \times  \sqrt{9}

3 \times 3

9

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