e^2+4e-21=0 use factorization to solve for the
values of e.
To factorize, we need to find two numbers that multiply to -21 and add to 4. These numbers are 7 and -3:
(e + 7)(e - 3) = 0
Setting each factor to zero, we get:
e + 7 = 0 or e - 3 = 0
Solving for e, we get:
e = -7 or e = 3
Therefore, the solutions for e are e = -7 and e = 3.