Answer:
(x+2)(x+8)
Step-by-step explanation:
1.)find factors of the third expression(16)that will add up to give the second expression(10)
16=2×8. 10=2+8
2.)substitute those factors inplace of 10


3.)factorise using grouping method



For 3. he answer is a
for 4 the answer is two
Parallel lines are in the same plane, never intersect, and have the same slope.