Q:

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<0x2βˆ’6xβˆ’7<0Convert the inequality to an equation.x2βˆ’6xβˆ’7=0Factor x2βˆ’6xβˆ’7 using the AC method.Tap for more steps...(xβˆ’7)(x+1)=0Set xβˆ’7=0 and solve for x.Set the factor equal to 0.xβˆ’7=0Add 7 to both sides of the equation.x=7Set x+1=0 and solve for x.x=βˆ’1Consolidate the solutions.x=7,βˆ’1Use each root to create test intervals.x<βˆ’1βˆ’1<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<βˆ’1 Falseβˆ’1<x<7 Truex>7 FalseThe solution consists of all of the true intervals.βˆ’1<x<7Convert the inequality to interval notation.(βˆ’1,7)