Question

answer the question in the photo​

Answer 1

Step-by-step explanation:

apply identity

a^2-b^2

so, 5^2-5

=20

this is the correct answer. please mark me brainliest

Answer 2

Answer:

$(5 + \sqrt{5} )(5 - \sqrt{5} ) \\ Use \: the \: identity \: :- (a+b) (a-b) =a²-b² \\ Here, \: a = 5 \: and \: b=√5 \\ Now, \\ (5+√5) (5-√5) \\ (5) ²-(√5) ² \\ 25-5 \\ =20$

$\small\underline\mathcal\pink{Required \: Solution :-}$

${\underline{\boxed{\sf{\purple{\mathtt{ = 20}}}}}}$