b)
Answer:
Explanation:
The given quadratic equation is
a^2 - 121 = 0
It can be written as
a^2 + 0a - 121 = 0
The terms to be added are - 11 and 11
- 11 + 11 = 0
- 11 x 11 = - 121
Thus, we have
(a + 11)(a - 11) = 0
a + 11 = 0 or a - 11 = 0
a = - 11 or a = 11
a = - 11, 11
