Question

Find the value of 9x2 + 49 y2

- 42xy when x= 5 and y=3.

Answer 1

Answer:

9*5+49*3*2-42*5*3

45+147*2-210*3

45+294-630

24 9-630

-381

Answer 2

Answer:

9x^2+49y^2-42xy

Step-by-step explanation:

x=5,y=3

9*5^2+49*3^2-42*5*3

225+441-630

36