Question

Simplify (- 3 + √5) (- 3 - √5)

Answer full

Answer 1

Answer:

given :- (5+√3)(√5-√3)

= 5(√5-√3) + √3(√5-√3)

= 5√5 - 5√3 + √15 - √9

= 5√5 - 5√3 + √15 - 3

Step-by-step explanation:

Answer 2

Answer:

$( - 3 + \sqrt{5} )( - 3 - \sqrt{5} ) \\ apply \: formula \: (x + y)(x - y) = {x}^{2} - {y}^{2} \\ = ( - 3) {}^{2} - ( \sqrt{5} ) {}^{2} \\ = 9 - 5 = 4 \: \: ans \\ hint : ( \sqrt{n} ) {}^{2} = n$

Jai Hind ❤️.