Question

What are the foci of the hyperbola given by the equation
16x^2 – 9y^2 – 64x + 72y – 224 = 0 ?

(–7, –4) and (3, –4)
(–7, 4) and (3, 4)
(–3, –4) and (7, –4)
(–3, 4) and (7, 4)

Answer 1

do u know how to complete squares?

Answer 2

Not really. Could you show me how to solve step by step?:)

Answer 3

sorry. the internet service here is pityfull.

Answer 4

u have
\[ \large 16x^2-64x-9y ^2+72y=224 \]
i rearranged things a little bit
ok?