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→Given: (3+2√2)(3-2√2)
→ To show: the given number is not an irrational number
→ solution:
using identity,
(a+b)(a-b)= a²- b² , we have,
(3+2√2)(3-2√2)= 3²-(2√2)²
= 9 - 8= 1
therefore, 1 is a rational number .
Hence proved
_____________________________
I hope it helps you!
→ To show: the given number is not an irrational number
→ solution:
using identity,
(a+b)(a-b)= a²- b² , we have,
(3+2√2)(3-2√2)= 3²-(2√2)²
= 9 - 8= 1
therefore, 1 is a rational number .
Hence proved
_____________________________
I hope it helps you!
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