Question

simplify this question​

Answer 1

Answer:

(b) correct answer..........

Answer 2

Answer:

(a)

Step-by-step explanation:

($\sqrt{5}$-$\sqrt{2}$)($\sqrt{5}$+$\sqrt{2}$)

= $\sqrt{5}$($\sqrt{5}$-$\sqrt{2}$)+$\sqrt{2}$($\sqrt{5}$-$\sqrt{2}$)

= 5- $\sqrt{10}$ + $\sqrt{10}$-2

= 5-2

= 3 (Ans)