Question

If x=2-root 5/2+root5 and y = 2+root 5 / 2-root 5 find x square - y square

Answer 1

Step-by-step explanation:

x=2-√5/2+√5

y=2+√5/2-√5

x²-y²=(x-y)(x+y)

so

x+y=4

and x-y=2√5-√5

=√5

so x²-y²=4×√5

=4√5

thank you

Answer 2

Answer:

4√5 is the correct answer.