Question

3x^2y + xy^2 - 1 при x=2, y=-1

Answer 1

3x^2y+xy^1
3x^2y+xy
3(2) ^2(-1) +2×(-1) ^1
6^-1+(-2) ^1
-11/6

Answer 2

To evaluate the expression 3x^2y + xy^2 - 1 at x = 2 and y = -1, substitute the given values into the expression:

3x^2y + xy^2 - 1

= 3(2)^2(-1) + (2)(-1)^2 - 1

= 3(4)(-1) + 2(1) - 1

= -12 + 2 - 1

= -11.

Therefore, when x = 2 and y = -1, the expression 3x^2y + xy^2 - 1 evaluates to -11.