Question

Find the value of expression x²-3xy+y² for x = 3 and y = 2.​

Answer 1

Answer:

The value of x² - 3xy + y² is -5. Didn't understood how? Let's see the step-by-step explanation.

Step-by-step explanation:

= x² - 3xy + y²

= Now, we will put the values 3 and 2 for x and y

= 3² - 3 [3(2)] + 2²

= Remember: We have to multiply the number outside the bracket with the number inside the bracket. Here, we first multiplied 3 and 2 who were inside the bracket. Then we will multiply 3 which is outside the bracket with the product of 3 and 2.

= 3² - 3 (6) + 2²

= 3² - 18 + 2²

= Square of 3 is 9 and 2 is 4.

= 9 - 18 + 4

= -5