Question

(x² - y)² if x = -4 and y = 7

Answer 1

Answer: 81

Explanation:

Our task is to evaluate the expression when x =-4 and y = 7:

`\sf{(x^2-y)^2}` when x = -4 and y = 7, so we substitute -4 for x, and 7 for y:

`\sf{((-4)^2-7)^2`

`\sf{(16-7)^2}`

`\sf{9^2}`

`\sf{81}` {answer}, you're done! ^-^

Answer 2

81

Given :

• x = -4
• y = 7

To find :

• Value of (x²-y)²

Solution :

All we need to do in order to find the value of (x²-y)² is insert the respective value of the variables,

• (x²-y)² = [(-4)²-7)²
• (x²-y)² = (16-7)²
• (x²-y)² = (9)²
• (x²-y)² = 81

Therefore,81 is the required answer.