Question

2х^2-0,5у+6 при х=4, у=-2

Answer 1

2х²-0,5у+6, если х=4, у=-2, то 2×4²-0,5×(-2)+6=2×16+1+6=39

Answer 2

To evaluate the expression 2x^2 - 0.5y + 6 when x = 4 and y = -2, we simply substitute the given values of x and y into the expression and perform the calculations:

1. Substitute x = 4: 2(4)^2 - 0.5y + 6

2. Evaluate 4^2: 2(16) - 0.5y + 6

3. Simplify 2(16) to 32: 32 - 0.5y + 6

4. Substitute y = -2: 32 - 0.5(-2) + 6

5. Simplify -0.5(-2) to 1: 32 + 1 + 6

6. Add 32 + 1 to get 33: 33 + 6

7. Finally, add 33 + 6 to get the result: 39

So, when x = 4 and y = -2, the expression 2x^2 - 0.5y + 6 evaluates to 39.