Question

The number of positive resl rootd for the expression for -3x³+8x²-7x+10=0 is less than or equal to​

Answer 1

Explanation:

By Descartes' Rule of Signs, f(x) = -3x³ + 8x² - 7x + 10 changes sign 3 times, so there are 1 or 3 positive roots.