If p and q are the zeroes of a polynomial x² + 7x+8 then form a polynomial whose zeroes 2p and 2q.
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Given : p and q are the zeroes of a polynomial x² + 7x+8
To Find : form a polynomial whose zeroes 2p and 2q.
Solution:
p and q are the zeroes of a polynomial x² + 7x+8
p + q = Sum of zeroes = - 7/1 = - 7
pq = product of zeroes = 8/1 = 8
a polynomial whose zeroes 2p and 2q.
Sum of zeroes = 2p + 2q = 2(p + q) = 2 ( - 7) = - 14
product of zeroes = 2p * 2q = 4pq = 4( 8) = 32
Hence a polynomial can be
x² -(- 14)x + 32
= x² + 14x + 32 a polynomial whose zeroes 2p and 2q.
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