Question

What are all the values for xx such that x2<3x+18?x^2<3 x+18 ? (A) x<3x<-3 (B) 3<x<6-3<x<6 (C) x>3x>-3 (D) x<6x<6

Solution

Verified
Answered 1 year ago
Answered 1 year ago
Step 1
1 of 6

To find the solution for the inequality, manipulate the inequality so that the other side is equal to 00.

x2<3x+18x2(3x+18)<3x+18(3x+18)Subtract 3x+18 from each side.x23x18<0    Simplify.\begin{aligned} x^2&<3x+18\\ x^2-(3x+18)&< 3x+18-(3x+18)\color{#4257b2}{\text{\quad Subtract $3x+18$ from each side.}}\\ x^2-3x-18&<0\color{#4257b2}{\text{\qquad\qquad\qquad\qquad~~~ Simplify.}} \end{aligned}

Factor the quadratic expression.

(x6)(x+3)<0\begin{aligned} (x-6)(x+3)&<0 \end{aligned}

Create an account to view solutions

Create an account to view solutions

More related questions

1/4

1/7