Question

(√3 + √5)² use identities ​

Answer 1

Answer:

Factorise using suitable identities 2a^5 - 32a. Asked by ... how to do this question x=(√3+1)/ 2 find value of 4x^3-2x^2-8x+7. Asked by ...

Answer 2

Answer:

$(\sqrt{3} + \sqrt{5} ) {}^{2} \\ \\ using \: the \: identity \: (a + b) { }^{2} = a { }^{2} + b {}^{2} + 2 \times a \times b \\ = (\sqrt{3} ) {}^{2} + ( \sqrt{2} ) {}^{2} + 2 \times \sqrt{3} \times \sqrt{2} \\ = 3 + 2 + 2 \sqrt{6} \\ = 5 + 2 \sqrt{6}$

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