Question

answer with Explanation Please​

Answer 1

$\huge \star \; \bf \underbrace {ANSWER} \: \star$

‣ Given :

$\sf {(3 + \sqrt{5}) (3 - \sqrt{5})}$

‣ To Find :

$\textsf {Rational or Irrational}$

‣ Solution :

$\textsf {We know that,}$

$\fbox {\sf {(a + b) (a - b) = a² - b²}}$

$\textsf {So,}$

➡ $\sf {(3 + \sqrt{5}) (3 - \sqrt{5})}$

$\sf {= (3)^{2} - (\sqrt{5})^{2}}$

$\sf {= 9 - 5}$

$\sf {= 4}$

$\rightarrow \textsf {\underline {Hence, the answer is 4.}}$

$\rightarrow \textsf {\underline {Therefore, it is a rational number.}}$

$: \implies \fbox {\sf {\underline{\underline {TRUE}} }}$

________❤️________

Answer 2

Answer:

a) true

Step-by-step explanation:

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