Question

3x² − 2xy − 5y² at x = 2 and y = 5​

Answer 1

Answer:

(3×2×2)- (2×2×5)- (5×5×5)

Step-by-step explanation:

12-20-125

32-125

=92

Answer 2

Answer:

3x² − 2xy − 5y² at x = 2 and y = 5

Step-by-step explanation:

we have x= 2 and  y= 5

= 3(2)^2 - 2*2*5 - 5(5)^2

= 3* 4 - 20 - 5* 25

= 12 - 20 - 125

=  -133