Question

Factories please please
1-3a-28a^2

Answer 1

Answer:

-1/4 and 1/7

Step-by-step explanation:

1 - 3a - 28a^2 =0

28a^2 + 3a - 1 = 0 ( changing signs)

28a^2 + 7a - 4a - 1 = 0

7a(4a + 1) -1(4a + 1) = 0

So a = - 1/4 Or a = 1/7