Question

Multiply : (3x - 4y +7z) (4y + 2x - 9z)​

Answer 1

$(3x - 4y +7z) (4y + 2x - 9z)$

$12xy + 6 {x}^{2} - 27xz - 16 {y}^{2} - 8xy + 36yz + 28yz + 14xz - 63 {z}^{2}$

$6 {x}^{2} - 16 {y}^{2} - 63 {z}^{2} + 12xy - 8xy - 27xz + 14xz + 36yz + 28yz$

$6 {x}^{2} - 16 {y}^{2} - 63 {z}^{2} + 4xy - 13xz + 64yz$