Answer:
Factors (12 - 7x) ( 12 +7x ) .
Step-by-step explanation:
Given : 144 − 49x².
To find : Which is a factor .
Solution : We have given 144 − 49x²
We can write 144 = (12)².
49 = (7)².
Then (12)² - (7x)².
By the formula (a)² - (b)² = (a-b) ( a+b) .
Here, a = 12 , b = 7x
(12)² - (7x)² = (12 - 7x) ( 12 +7x ) .
Therefore, Factors (12 - 7x) ( 12 +7x ) .
