Question

which value is a zero of the function f(x)=-8x^3+70x^2-177x+135
1.-5.25
2.-3.53
3.1.75
4.2.25

Answer 1

\[135-177 x+70 x^2-8 x^3=-(-5+x) (-3+2 x) (-9+4 x) \]The zeros are: {1.5,2.25,5}
4. 2.25
A Log plot is attached.