Precal Help?

Question

Determine the constants (denoted by capital letters) so that the equation is an identity. Use either the equating-the-coefficients theorem, as in Example 1, the convenient-values method that was explained after Example 1, or a combination.

 

x2 + 1

(x + 1)(x2 + 8)

 = 

A

x + 1

 + 

Bx + C

x2 + 8

 

A = 
B = 
C = 

Answer 1

The values are A = 2/9, B = 7/9 and C = - 7/9.