Is root12.25 a rational or irrational number?

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Solution

Dear Student.

$12.25 = 3.5 \times 3.5 T h e r e f o r e, \sqrt{12.25} = \sqrt{{(3.5)}^{2}} = 3.5 S i n c e 3.5 i s a r a t i o n a l n u m b e r, h e n c e \sqrt{12.25} i s a r a t i o n a l n u m b e r .$

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