How do you factor completely #a^2 - 121b^2#?
2 Answers
Jun 13, 2018
Explanation:
The difference of sqares identity can be written:
#A^2-B^2 = (A-B)(A+B)#
Given:
#a^2-121b^2#
Note that both
So we can use the difference of squares identity with
#a^2-121b^2 = a^2-(11b)^2 = (a-11b)(a+11b)#
Jun 13, 2018
Shown below...
Explanation:
Use difference of two squares: