Polunomial+Inequalities

Polynomial Inequalities october 12, 2011 Solve: F(x) = x^2 - x -12 < 0

(x-4) (x+3) < 0 factor

3 methods:

CHART -plug in values for each interval Therefore f(x)<0 if -34 ||
 * x-4 || - || - || + ||
 * x+3 || - || + || + ||
 * f(x) || + || - || + ||

NUMBER LINE -plug in values for each interval

refer to : []

GRAPH draw graph and look which intervals satisfy condition refer to: []