Question

verify whether the following are the zeroes of the polynomial , indicated against them. 1=. p(x)=3x+1,x= -1 upon 3 2=. p(x)=5x-pie,x=4 upon 5

Answer 1

1)
p(x) = 3x + 1

3x + 1 = 0

x = -1/3

p[-1/3 ] = 3 × -1/3 + 1
= -1 + 1
= 0

Hence ,
-1/3 is a zero of the polynomial


2)
p[x]= 5x - π

x = 4/5
p [ 4/5] = 5 × 4/5 - π

= 4 - π

π = 22/7

4 - 22/7 ≠ 0

Hence ,
4/5 is not a zero of the polynomial