Question

7. Add :
5x(x2 - xy + y²), 5y(x2 + xy + y2) and find its value for x = 2 and y = 1​​

Answer 1

Step-by-step explanation:

5x (x² -xy + y² ) , 5y (x² + xy + y²)

now ,

5x (x² - xy + y²) + 5y (x² + xy + y²)

5x³ - 5x²y + 5xy² + 5x²y + 5xy² + 5y³

5x³ + 5y³ + 10xy²

Now put the value of x and y .....

therefore ....

5(2)³ + 5(1)³ + 10(2)(1)

5* 8 + 5 + 20

40 + 5 + 20

65......

Hey friend your answer is correct ....