x^3+x^2-17x+15=0

Identify all the real roots of x^3 +x^2-17x+15= 0.
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x^3+x^2-17x+15. or,(x^3-1)+17x(x-1)-16(x^2-1) Or,(x-1)(x^2+x+1)+17x(x-1)-16(x-1)(x+1) Or,(x-1)(x^2+x+1+17x-16x-16) Or,(x-1)(x^2+2x-15)=0 Or,(x-1)(x+5)(x-3)=0 Or,x=1,3,-5
by Level 4 User (7.9k points)

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