Solve the inequality and express your answer in interval notation. x^2+6x+7<0
Accepted Solution
A:
Step-by-step explanation:Notation x^2-6x-7<0x2β6xβ7<0Convert the inequality to an equation.x2β6xβ7=0Factor x2β6xβ7 using the AC method.Tap for more steps...(xβ7)(x+1)=0Set xβ7=0 and solve for x.Set the factor equal to 0.xβ7=0Add 7 to both sides of the equation.x=7Set x+1=0 and solve for x.x=β1Consolidate the solutions.x=7,β1Use each root to create test intervals.x<β1β1<x<7x>7Choose a test value from each interval and plug this value into the original inequality to determine which intervals satisfy the inequality.Tap for more steps...x<β1 Falseβ1<x<7 Truex>7 FalseThe solution consists of all of the true intervals.β1<x<7Convert the inequality to interval notation.(β1,7)