Question

a quadratic polynomial whose zeroes are -4 and -5 is

Answer 1

Answer:

X^2+X-20 is your polynomial

Step-by-step explanation:

Since -5 and 4 are zeroes of the equation therefore (x+5) and (x-4) r the factors...

now equation is

(x+5)(x-4)=x^2+5x-4x-20=x^2+x-20

therefore the required equation is x^2+x-20

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Answer 2

Answer:

let a =1 .... (i)

sum of  zeroes = -b/a

-4+(-5) = -b/a

-9= -b/a

9 = b/a

product of zeroes = c/a

(-4) * (-5) = c/a

20 = c/a

fro above we have obtained a quadratic equation

x^2+9x+20=0

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