Question

Show that x = 3 is a root of the polynomial equation x2

– 2x -3 = 0

need help exam is going on
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Answer 1

Step-by-step explanation:

x²-2x-3=0

x²-3x+x-3=0

x(x-3)+1(x-3)=0

(x+1)(x-3)=0

x=-1,3

So x=3 is a root