Question

find the product of each pair of expressions x - y -z and y +z​

Answer 1

Step-by-step explanation:

(x-y-z) × (y+z)

$(xy - y {2} - zy) + (xz - yz - z {}^{2})$

$- y {}^{2} - z {}^{2} + xy + xz - 2yz$

Answer 2

$(x - y - z) \times (y + z) \\ x(y + z) - y(y + z) - z(y + z) \\ xy + xz - {y}^{2} - yz - zy - {z}^{2} \\ xy \: + xz - {y}^{2} - {z}^{2} - 2zy$