Question

10. Examine whether the number ( 5 + √5 ) ( 5 - √5 ) are rational or irrational .

Answer 1

Step-by-step explanation:

Using formula x-1× x+1 =x^2-1^2

25-5 =20

therefore it is a rational number

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Answer 2

Answer:

rational

Step-by-step explanation:

put the formula a square minus b square then we get

25-5=20