Question

7+ root 5 square - 7 - root 5 square

Answer 1

Answer:

0

Step-by-step explanation:

=7+$\sqrt{5}$ -7-$\sqrt{5}$

=0

Answer 2

(7+√5)^2=49+14√5+5=54+14√5

(7-√5)^2=49-14√5+5=54-14√5

therefore (54+14√5)-(54-14√5)

=54-54+14√5+14√5

✔️✔️✔️=28√5✔️✔️✔️