Question

plz help
Factor completely.

4u2 – 28u + 49




A.


(2u – 7)2


B.


(4u + 7)2


C.


2(2u – 7)2


D.


(2u – 4)2

Answer 1

first find the required square roots of 4u^2 and + 49

Answer 2

remember + 49 has 2 square roots. Only one is correct in this question.

Answer 3

7 is the root of 49 iknow

Answer 4

- not only 7

Answer 5

but the square root 4u^2 is 2u

Answer 6

thats correct
but 7 is not the correct one for this problem because the second term in the expression is - 28u

Answer 7

so its -7

Answer 8

right

Answer 9

so now you know the answer

Answer 10

so its a or c

Answer 11

how can it be c?

Answer 12

good point thanks