Question

simplify (-3+√5) (-3-√5)​

Answer 1

ANSWER : 4

EXPLANATION :

(-3+√5) (-3-√5)

= {-(3-√5)} {-(3+√5)}

= (3-√5)(3+√5)

= 3²-√5²

= 9-5

= 4

ANOTHER METHOD ( EASY ONE) :

(-3+√5) (-3-√5)

= {(-3)²-√5²}

= 9-5

= 4.

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