Question

TIIU VIE end?
Sokharam was ploughing the field from 8 in the morning. At 12:30 in the
oped and started for home. He reached home at 1:30. How long was no p
the field? How long did it take him to reach home from the field?​

Answer 1

Answer:

Using Factor Theorem.

If p(x) is divisible by x - 1 then

p(-[-1]) = 0

or p(1) = 0.

Substituting x = 1 in p(x) and equating to 0.

1^3 - a(1)^2 - 13(1) + 15 = 0

1 - a - 13 + 15 = 0

3 - a = 0

a = 3.