Question

A quadratic polynomial, whose
zeroes are 5 and 4, is
a) x² - 5x+4
b) x² + 5x-4
c) x² + x-20
d) x² - 9x+20​

Answer 1

Answer:

d is the answer

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Answer 2

Sum of two zeroes = 5+4 = 9.

Product of two zeroes = 5×4 = 20

A quadratic equation can be written as : x² - (sum of two roots)x + product of two roots = 0

=> x²-9x+20 = 0

So, the polynomial is x²-9x+20 [Ans.]