Question

for what k if 3 is zero of polynomial x sqaure + 11 x + k =0

Answer 1

If 3 is the zero of the polynomial then,

x^2 +11x + k = 0

=> (3)^2 + 11×3 + k = 0

=>9+ 33+k=0
=> 42+k = 0

=>k = -42

Cheers !

Answer 2

Hey friend

As 3 is the zero of polynomial x²+11x+K=0

So, Putting X=3

=>3²+11×3+K=0

=>9+33+K=0

=>42+K=0

=>K= -42


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