Unit 3 Formulas

First step for calculating a quadratic (a)

second difference = 2a

Second step for calculating a quadratic (b)

first difference = 3a+b

Third step for calculating a quadratic ( c )

first term = a+b+c

Putting it together

ax²+bx+c

Linear pattern formula

Un=bn+c

Common difference for linear patterns

U3-U2=U2-U1