Answer:
(2n + 7) (2n +7)
Step-by-step explanation:
To solve this problem we need to factorize 4n^2 + 28n +49 as shown below

thus, after factorization we see that first option is correct one
(2n + 7) (2n +7)
we can validate this by expanding it
2n (2n +7) + 7 (2n+7)\
=> 4n^2 + 14n + 14n + 49 = 4n^2 + 28n +49 (which is equal to the problem stated expression)
Answer:
As to sidea are equal therefore it is an isosceles triangle .
therefore
,80+x+x=180
80+2x=180
2x=100
x=50
Angle b should be 119 degrees
Answer:
39.52
Step-by-step explanation: