1.
x^2/16+y^2/36=1
2.
a=2,c=1,b=sqrt(3)
x^2/4+y^2/3=1
3.
b=8
(a-b)/(a+b)=3/5
a=32
y^2/1024+x^2/64=1
4.
a+b=16
c=4
c^2=a^2-b^2=(a+b)(a-b)=16
a-b=1
a=17/2
b=15/2
4x^2/289+4y^2/225=1
1.
x^2/16+y^2/36=1
2.
a=2,c=1,b=sqrt(3)
x^2/4+y^2/3=1
3.
b=8
(a-b)/(a+b)=3/5
a=32
y^2/1024+x^2/64=1
4.
a+b=16
c=4
c^2=a^2-b^2=(a+b)(a-b)=16
a-b=1
a=17/2
b=15/2
4x^2/289+4y^2/225=1