If A = { (x,y) : x^2 + y^2 = 25 } and B = { (x,y) : x^2 + 9y^2 =144 }, then A intersection B contains ___. (MU-OET 2015)
a) one point
b) two points
c) three points
d) four points
Answers
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25-y^2=144-9y^2
or,8y^2=119
or,y^2=119/8
x^2=25-119/8
=200-119/8
=81/8
four point
for one positive x we get two real y
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