Question

(5+√5)(5−√5) Simplify the given expressions.

Answer 1

$\bold{Answer :}$

Now,

(5 + √5) (5 - √5)

= (5 × 5) - (5 × √5) + (5 × √5) - (√5 × √5)

= 25 - 5

= 20

We can also find the value using identity rule

(a + b) (a - b) = a² - b²

So, (5 + √5) (5 - √5)

= 5² - (√5)²

= 25 - 5

= 20

#$\bold{MarkAsBrainliest}$

Answer 2

Given ( 5 + √5 )( 5 - √5 )

= 5² - ( √5 )²

[ By algebraic identity ,

x² - y² = ( x + y )( x - y ) ]

= 25 - 5

= 20

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