Question

is x(x+4) -5-4x a quadratic polynomial. if yes, find sum of its zeroes​

Answer 1

Answer:

x(x+4) -5-4x

x²+4x-4x-5

x²-5

It is a quadratic polynomial

SUM OF ZEROES= -b/a= 0

JUST FOR VERIFICATION:

Let the zeros be α,β.

x² - 5 = 0

=> x² = 5

=> x = ±√5

α = √5

β = -√5

Sum of zeroes =  α+β.

=> √5 - √5 = 0

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