How many factors are in the expression (4x3)(8x+90)(3x2+y)?
To fine the roots of the equation x3-8x2-3x+90=0, all the possible rational roots were tested with the function f(x)=x3-8x-3x+90. Is x=-3 a root of the equation?
No, because f(-3)≠0.
No, because f(-3)=0.
Yes, because f(-3)≠0.
Yes, because f(-3)=0.