x^3-6x^2-13x+42=0
solve the equation.
(x - 7) (x - 2) (x + 3)
learnt remainder and factor theorem?
Hi Stampboy123,
Is this a question from Additional Maths?
If so, you will need to apply factor theorem, long division and factorisation to solve it.
1. Guess a factor by letting x take values such as 1, 2, 3, etc, and substitute it into the expression. If that value, say a, gives zero upon substitution, then (x - a) is a factor.
2. Apply long division, i.e., divide the expression by (x - a).
3. Factorise the result (which is a quadratic expression), say, by trial and error.
Thanks.
Cheers,
Wen Shih
ok thxs.