Question

if 1 and -1 are the zeroes of the polynomials Px^3+x^2-2x+q. Find the value of p and q​

Answer 1

Step-by-step explanation:

substitute 1 and -1 in the polynomial and equate them to zero. on substituting x=1 we get,

p+1-2+q = 0

p+q = 1 ----- equation 1

on substituting x= -1 we get,

-p +1+2+q= 0

p-q = 3 ----- equation 2

add equation 1 and 2 we get,

2p = 4

p = 2

substitute this in equation 1 to get

q = -1

Answer 2

q = -1

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