Réitigh (1.8s^2-1.4r^2)+(0.5rs-1.2r^2+2.4s^2)

$$( 1.8 s ^ { 2 } - 1.4 r ^ { 2 } ) + ( 0.5 r s - 1.2 r ^ { 2 } + 2.4 s ^ { 2 } )$$

Luacháil

$$\frac{rs}{2}+\frac{21s^{2}}{5}-\frac{13r^{2}}{5}$$

Céimeanna Réitigh

Comhcheangail -1.4r^{2} agus -1.2r^{2} chun -2.6r^{2} a fháil.

$$1.8s^{2}-2.6r^{2}+0.5rs+2.4s^{2}$$

Comhcheangail 1.8s^{2} agus 2.4s^{2} chun 4.2s^{2} a fháil.

$$4.2s^{2}-2.6r^{2}+0.5rs$$

Difreálaigh w.r.t. s

$$\frac{r}{2}+\frac{42s}{5}$$