A given line is one of the lines of a pair, or two pairs share a line: find the unknown

1. A.
   $an^2+2hmn+bm^2=0$
2. B.
   $am^2+2hmn+bn^2=0$
3. C.
   $am^2-2hmn+bn^2=0$
4. D.
   $an^2-2hmn+bm^2=0$

Tap an option to check your answer.

1. A.
   $2,\frac{25}{4}$
2. B.
   $\ - 2,\frac{25}{4}$
3. C.
   $2,\frac{- 25}{4}$
4. D.
   $\ - 2,\frac{- 25}{4}$

Tap an option to check your answer.

1. A.
   $(-3, 0)$
2. B.
   $[0, 1]$
3. C.
   $[-1, 1]$
4. D.
   $[-3, 0)$

Tap an option to check your answer.