2.9.2 Solving an Equation Containing a Radical

Question 1

solve an equation containing a radical

Answer 1

• first eliminate the radical.
• If one side of the equation is nothing but a radical, squaring both sides instantly eliminates the radical. At the same time
  there will be significant changes on the other side of the equation.
• Extraneous roots do exist for these equations. Always check your answers to see which, if any, are really solutions for
  your equations.
• Take only the principal (positive) square root when checking equations with radicals for extraneous roots.