Question

Find all the zeroes of the cubic polynomials x3-4x+x2-4 if one of its zero is -1​

Answer 1

Answer:

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Answer 2

Answer:

x3-4x+x2-4=0

x(x2-4)+1(x2-4)=0

(x2-4)(x+1)=0

x2-4=0;x+1=0

x2=4;x=-1

x=√4;x=-1

x=+2,x=-2,x=-1