# How do you use synthetic substitution to evaluate x=4 for #P(x)= x^3 - 4x^2 + 4x - 5#?

##### 1 Answer

Nov 20, 2015

(see below for synthetic substitution)

#### Explanation:

line 1: the coefficients of the polynomial terms (in descending order of powers of

line 2: the product of the value of

line 3: just a pretty line to keep things in place

line 4: the sum of the the values in this column in lines 1 and 2

The final sum (in line 4) is the value of the polynomial at the required value of