Question

3x²y - y² when x = -2 and y = 5

Explanation:

Step1: Substitute x=-2, y=5

$3(-2)^2(5) - (5)^2$

Step2: Calculate each term

$3(4)(5) - 25 = 60 - 25$

Step3: Final subtraction

$60 - 25 = 35$ Wait correction: Wait 3(-2)^25 =345=60; 5^2=25; 60-25=35. Correct final answer is 35.

Wait revised:

Step1: Substitute values

$3(-2)^2(5) - (5)^2$

Step2: Compute squares

$3(4)(5) - 25$

Step3: Multiply first term

$60 - 25$

Step4: Subtract

$35$

Answer:

55