Question

If 5x+9 =0 is the directrix of hyperbola 16x²-9y² = 144, then
its focus is​

Answer 1

Answer:

Step-by-step explanation:

16x^2-9y^2=144

So dividing throughout it by 144,

X^2÷9 - y^2÷16=1

C^2 = a^2+b^2

= 16+9

=25

Since,c = 5.

Focus = (+/- 5,0)