
Solve each equation by squaring both sides of the equation and then by using a quadratic form. Then we have to check whether either method give an extraneous root

Answer to Problem 18WE
Explanation of Solution
Given information :
Firstly we take square on both sides, we get,
Here we may use the formula
Now we get,
Now we know that the roots of the equation
Hence we compare the equation and put values we get,
Here both 9 and 1 does satisfy when checked in original equation.
Chapter 7 Solutions
Algebra and Trigonometry: Structure and Method, Book 2
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