401 MrG Real Roots of Polynomial Functions!

2477 days ago by MATH4R2013

#1) solve for x: x^3-4*x^2+2*x-5==0 f(x)=x^3-4*x^2+2*x-5 show(f(3)) show(factor(f(x))) show(solve(f(x)==0,x)) plot(f(x),-5,5) 
       



#2) solve for x: 2*x^3-x^2+2*x-3==0 f(x)=2*x^3-x^2+2*x-3 show(f(1)) show(factor(f(x))) show((f(x)/(x-1)).simplify_rational()) show(solve(f(x)==0,x)) plot(f(x),-5,5) 
       




#3) solve for x: 2*x^3+11*x^2-7*x-6==0 f(x)=2*x^3+11*x^2-7*x-6 show(f(1)) show(factor(f(x))) show((f(x)/(x-1)).simplify_rational()) show(((2*x^2+13*x+6)/(x+6)).simplify_rational()) show(solve(f(x)==0,x)) plot(f(x),-7,2)