I believe the answer is C
Answer:

Step-by-step explanation:

Answer:
x = 6
Step-by-step explanation:
Since the triangles are similar then the ratios of corresponding sides are in proportion, that is
=
, substitute values
=
=
( cross- multiply )
2x = 12 ( divide both sides by 2 )
x = 6
Hi,
Your answer would be: −2x4+10x3−21x2+19x−4
Hope I could help!~ have a good day/night :]
The answer is A... HOPE IT HELPS!