The th term of a quadratic sequence is given by

MATHEMATICS · Subjective · GCSE · Mathematics · Algebra · Algebra

Problem

The

n

th term of a quadratic sequence is given by

an^2+bn+c

. The first term is

-5

, the second term is

1

, and the fourth term is

25

. Work out the values of

a

b

, and

c

. Show your working.