There's an app called photomath that would be useful for these kinds of problems!
Answer:

Step-by-step explanation:
2x² + 5x + 3 = (x + 1) (2x + 3)
x² + 2x + 1 = (x + 1) (x + 1)
(x + 1) cancels out because there is one in the denominator and the numerator, leaving you with the answer.
Hope this helps!
Answer:
The answer is A, 50°.
Here, angle CAB= 60°.
In triangle ABC,
60°+70°+ angle ABC= 180°.
angle ABC= 50°.