Factor out all common monomials first.
2007-08-09 07:33:56 · 3 answers · asked by Raelene G 1 in Education & Reference ➔ Homework Help
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2007-08-09 07:53:11 · answer #1 · answered by Anonymous · 0⤊ 0⤋
There aren't any common monomials here.
Maybe you forgot an x after the 8.
If we want to factor this over the rationals, let's
suppose a/b is a root, of 15x^3 - 4x^2 +8 = 0,
i.e. x - a/b is a factor.
Then a must divide 8 and b must divide 15.
With the aide of PARI, we try all these and none
of them work, so this trinomial is irreducible.
2007-08-09 14:52:43 · answer #2 · answered by steiner1745 7 · 0⤊ 0⤋
There is no obvious factorization for this. The expression necessarily has one real root (at about x = -0.6), but the root is probably irrational and the other roots are complex.
2007-08-09 14:48:37 · answer #3 · answered by Anonymous · 0⤊ 0⤋