Question

Add 3y(2xy-yz+zx) & 4x(5yz-2z+3y²)

Answer 1

$3y(2xy - yz + zx) + 4x(5yz - 2z + 3 {y}^{2} ) \\ 6 {x}^{2} y - 3 {y}^{2} z + 3xyz + 20xyz - 8xz + 12x {y}^{2} \\ 6 {x}^{2} y - 3 {y}^{2} z + 23xyz - 8xz + 12x {y}^{2}$

Answer 2

3y(2xy - yz + zx) + 4x(5yz - 2z + 3y²)
= 6xy² - 3y²z + 3xyz + 20xyz - 8xz + 12xy²
= 6xy² + 12xy² - 3y²z + 3xyz + 20xyz - 8xz
= 18xy² - 3y²z + 23xyz - 8z