Question

. Add: (5x2 - 3y2 + z) + (-x2 + 2y2 - 4z).​

Answer 1

$(5 {x}^{2} - 3 {y}^{2} + z) + ( - {x}^{2} + 2 {y}^{2} - 4z)$

$5 {x}^{2} - 3 {y}^{2} + z - {x}^{2} + 2 {y}^{2} - 4z$

$4 {x}^{2} - {y}^{2} - 3z$