67x36 is estimated to 70x40 but will it be greater or less than the actual product

Ineed to know the answer to this algebra question.

If (x-2) 2= 49, then x could be a. -9 b. -7 c.- 2 d. 5 e.9

Match the following reasons with the statements given to create the proof. 1. do = ob, ao = oc sas 2. doc = aob given 3. triangle cod congruent to triangle aob vertical angles are equal. 4. 1 = 2, ab = dc if two sides = and ||, then a parallelogram. 5. ab||dc if alternate interior angles =, then lines parallel. 6. abcd is a parallelogram cpcte