Question

please solve this question
urgently​

Answer 1

Answer:

The answer given in your book is wrong. that answer is only correct for x-y

Step-by-step explanation:

rationalize x=5-√3/5+√3=5-√3*5-√3/5+√3*5-√4

x=(25+3-10√3)/25-3=(28-10√3)/22=(14-5√3/11)

now rationalize y=5+√3*5+√3/5-√3*5+√3

Y=(25+3+10√3)/25-3=(28+10√3)/22=14+5√3/11

x-y=(28-10√3/22)-(28+10√3/22)

x-y=-20√3/22=-10√3/11

x²_y²=(14-5√3)²/11²-(14+5√3)²/11²

x²-y²=1/11²(196+75-140√3)-(196+75+140√3)

x²-y²=-280√3/11²

Answer 2

Question is slightly wrong. Please refer to the attachment. Hope it helps