Question

please give me answer ​

Answer 1

Answer:

1)√5+√3

______

√5-√3

√5+√3. ×. √5+√3

√5-√3. √5+√3

5+3+2√15

5-3

8+2√15

2

4+√15

2)

Answer 2

Answer:

Answer 1 you copy from picture

answer 2— Let X =2.015

Then X=2.0151515......-----eq1

Multiplying eq1 with 10

10x=20.151515.....------eq2

again multiplying eq2 by 1000

1000x= 2015.151515.....----—eq3

Now,

Subtracting eq (2)From eq(1) we get

1000x=2015.151515

10x=20.151515

---------------------------------

990x=1995

So,

990x=1995

x=1995/990

x=399/198

Answer3: Given

Sides =50cm,45cm and 35cm

where a=50cm b=45cm c=35cm

Semi perimeter(s)=a+b+c/2

S=50+45+35/2

S= 130/2

S=65cm

Now

area of triangle=√S(s-a) (s-b) (s-c)

=√65(65-50)(65-45)(65-35)

=√65×15×20×30

=√585000

=764.85