I believe the answer would be B
Step-by-step explanation:
ever coner should have a value.... for example sinA or cos$
please check the question again
( x-5 ) (x + 6 )
multiply
X times X + 6x - 5x - 5 times 6
connect like terms
x squared + 6x - 5x - 30
Answer is
x squared + x - 30
1.

so

Answers B and D.
2.

Answer D.
3.
The same as point 2. Answer D.
4.
Answer C.