Question

subtract (2x²+3y²-4z²) from (2z²-3x²+4y²)​

Answer 1

$\leadsto\sf(2x²+3y²-4z²) - (2z²-3x²+4y²)$

$\tt \leadsto2{x}^{2}+3{y}^{2}-4{z}^{2}-2{z}^{2}+3{x}^{2}-4{y}^{2}$

$\tt \leadsto(2{x}^{2}+3{x}^{2})+(3{y}^{2}-4{y}^{2})+(-4{z}^{2}-2{z}^{2})$

$\boxed{ \color{darkcyan} \tt \leadsto5{x}^{2}-{y}^{2}-6{z}^{2}}$