2a^2+4a+1 is equivalent to 4a+4/2a*a^2/a+1
1) Answer:

2) Answer:

The answer for first equation is, option B.
and the Answer for Second equation is option D.
The answer to the question is -20
Answer:
No
Step-by-step explanation:
There's no such thing as -sin
Answer:
135, 9, 15
Step-by-step explanation:
Beads per necklace=(Total beads used)/(Total number of necklace made) = 135/9 = 15