Question

(3 + √5 )(5 + √3 )

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Answer 1

Answer:

(a + b)(a + b) = a² - b²

=(3)^2 -(root 5)^2

=9-5

=4.

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Step-by-step explanation:

Answer 2

⇒ $( 3+\sqrt{5} ) (5+\sqrt{3} )$

⇒ $3(5+\sqrt{3} )+\sqrt{5} (5+\sqrt{3} )$

⇒ $15+3\sqrt{3} +5\sqrt{5} +5\sqrt{5} + \sqrt{5} *\sqrt{3}$

⇒ $15+3\sqrt{3} +5\sqrt{5} +5\sqrt{5} + \sqrt{5*3$

⇒ $15+3\sqrt{3} +5\sqrt{5} +5\sqrt{5} + \sqrt{15$

∴ Answer is $15+3\sqrt{3} +5\sqrt{5} +5\sqrt{5} + \sqrt{15$

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