 Hi and welcome to the session. Let us discuss the following question. Question says, what should be the value of A if the value of 2x square plus x minus A equals to 5 when x is equal to 0? Let us now start with the solution. First of all we will find out value of the given algebraic expression at x is equal to 0. So we can write substituting x is equal to 0 in 2x square plus x minus A. We get 2x square plus x minus A is equal to 2 multiplied by square of 0 plus 0 minus A. We know this is the given algebraic expression and this is the given numerical value of x. So to find the value of this algebraic expression at x is equal to 0 we will substitute 0 for x in this expression and we get this expression. Clearly we can see here we have written 0 for x in this expression. Now 2 multiplied by square of 0 is 0 only. We know 0 square is 0 and 2 multiplied by 0 is 0. Now we will write plus 0 as it is and here we will write minus A. Now 0 plus 0 is 0 and 0 minus A is equal to minus A only. So we get value of 2x square plus x minus A is equal to minus A when x is equal to 0. We are also given that value of 2x square plus x minus A is equal to 5 when x is equal to 0. So from these two statements we get minus A is equal to 5. Now multiplying both the sides 5 minus 1 we get A is equal to minus 5. So required value of A is equal to minus 5. This is our required answer. This completes the session. Hope you understood the solution. Take care and have a nice day.