Question

2. Multiply and verify your result for x = 1, y = -2, and z = -1
13 ${x}^{2}y( {z}^{2} - {y}^{2} )$
​

Answer 1

given

x = 1

y = -2

z = -1

{x}^{2}y( {z}^{2} - {y}^{2} )

1^2 × - 2( - 1^2 -(- 2^2 ))

= - 2( - 1 - 4)

= - 2 - 5

= - 7

- 7is the correct answer