(2√3+√5) (2√3-√5)is rational or irrational ? justify the answe

1.	(2√3+√5) (2√3-√5)is rational or irrational ? justify the answer
Answer» Answer: 7 Step-by-step explanation: By USING the identity (a+b)(a-b)= a²-b² (2√3+√5) (2√3-√5) = ( $2\sqrt{3}^{2} - \sqrt{5} ^{2}$ ) = (4×3 - 5) = (12-5) = 7 Hope it HELPS... Please mark my answer as the BRAINLIEST...

(2√3+√5) (2√3-√5)is rational or irrational ? justify the answer

Answer»

Answer:

Step-by-step explanation:

By USING the identity (a+b)(a-b)= a²-b²

(2√3+√5) (2√3-√5)

= ( $2\sqrt{3}^{2} - \sqrt{5} ^{2}$ )

= (4×3 - 5)

= (12-5)

= 7

Hope it HELPS...

Please mark my answer as the BRAINLIEST...

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(2√3+√5) (2√3-√5)is rational or irrational ? justify the answer​

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