 Hi and welcome to the session. I am Asha and I am going to help you with the following question which says, are the following pair of sets equal? Give reasons. So first let us learn what are equal sets. Two sets are said to be equal if they have exactly same elements. Otherwise the sets are called unequal. That is unequal sets are those sets which are not equal sets. So this is the key idea with the help of which we will solve the above given problem. Let us now start with the first part where a is the set containing elements 2 and 3 and b is the set which contain all those element x such that x is the solution of x square plus 5x plus 6 is equal to 0. Now to find the set b we will find the solution of the equation x square plus 5x plus 6 is equal to 0. Now by splitting the middle term this can be written as x square plus 2x plus 3x plus 6 is equal to 0. Now taking x common from the first two terms and two common from the last two terms it can further be written as x into x plus 2 plus 3 into x plus 2 is equal to 0 or x plus 2 taking common we have x plus 3 is equal to 0. So this implies the product of two numbers is equal to 0 so this implies either x plus 2 is equal to 0 or x plus 3 is equal to 0. So this implies either x is equal to minus 2 or x is equal to minus 3. So the set b contains the element minus 2 and minus 3 which are the solutions of the equation x square plus 5x plus 6 is equal to 0. Now observing the sets a and b we find that they do not have the same elements and thus we can say that the set a is not equal to b and answer answer is no. Now proceeding on to the next part where a with the set of x such that x is a letter in the word follow. This is all the letters in the word follow are f, o, l and w. So a is the set which contains f, o, l and w elements. Now d is the set which contains all those y such that y is a letter in the word fulls is a set which contains again the letters f, l and w and on observing b and a you find that they exactly have the same elements this a and b have same elements and thus we can say that yes the set a is equal to b which completes the second part. And that is the solution. So hope you enjoyed it. Take care and have a good day.