Posted by **Mike** on Friday, October 19, 2007 at 6:54pm.

Solve the polynomial equation and graphy it on a number line. Express the solution set and interval notation. and which brackets to use either () or []

15X^2 < 14x + 1

- Math -
**Reiny**, Friday, October 19, 2007 at 7:43pm
This is an inequation, not an equation.

take everything to one side

15x^2 - 14x - 1 < 0, it factors

(15x+1)(x-1) < 0

If this **had been the equation**

y = (15x+1)(x-1) it would have been a parabola opening upwards with x-intercepts of -1/15 and 1

Between those two values the graph would have been below the x-axis

so the solution set is -1/5 < x < 1

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