Answer quickly

kevin needs to factor expression 49^2x - 16

his final answer is (7x + 8) (7x-8)

is his answer correct? if not, explain his error and factor the problem accurately.

No

Step-by-step explanation:49^2=2401. 2401x-16 can’t be factored

49x^2 -16

The answer is wrong, because multiplying 8 by 8 is 64, not 16.

Both 49 and 16 are perfect squares.

49x^2 is rewritten as (7x)^2

16 can be rewritten as 4^2

Now you have :

(7x)^2 - 4^2

This factors as (7x+4)(7x-4)