Quadratic formula - Wikipedia
https://en.wikipedia.org/wiki/Quadratic_formulaIn elementary algebra, the quadratic formula is a formula that provides the solution(s) to a quadratic equation. There are other ways of solving a quadratic equation instead of using the quadratic formula, such as factoring (direct factoring, grouping, AC method), completing the square, graphing and others. Given a general quadratic equation of the form
Solving Quadratic Inequalities
www.cliffsnotes.com › study-guides › algebraSince this quadratic is not easily factorable, the quadratic formula is used to solve it. Reduce by dividing out the common factor of 4. Since is approximately 3.2, Mark the boundary points using open circles, as shown in Figure 7, since the original inequality does not include equality. Select points from the different regions created (see Figure 8).
6: QUADRATIC INEQUALITIES
irp-cdn.multiscreensite.com › f15f3f52 › filesSelect the point "=3. We substitute "=3 to obtain: (3)#−6(3)+8<0 −1<0 which is true Hence, the required region is B and where and , stated as . Region C. Although it is not necessary, we could have tested "=5(in C) and obtain (5)#−6(5)+8<0 3<0 which is false Hence, the solution cannot lie in region C.