Exit fullscreen mode

Polynomials & Rational Functions

Review question

How many real roots does this cubic polynomial have?
Add to your resource collection Remove from your resource collection Add notes to this resource View your notes for this resource

Ref: R8711

Printable/supporting materials Printable version Fullscreen mode Teacher notes

Suggestion

Show that the equation \(x^3 - 6x^2 + 12 = 0\) has two positive roots and one negative root.

If we cannot deduce directly how to factorise a polynomial, do we know a way of honing in on the location of (any) roots?