Whakaoti i te r(r+s)-2r^2+rs-s(s-3r)

$$r(r+s)-2r^2+rs-s(s-3r)$$

Aromātai

$$-r^{2}+5rs-s^{2}$$

Ngā Upane Otinga

Whakamahia te āhuatanga tohatoha hei whakarea te r ki te r+s.

$$r^{2}+rs-2r^{2}+rs-s\left(s-3r\right)$$

Pahekotia te r^{2} me -2r^{2}, ka -r^{2}.

$$-r^{2}+rs+rs-s\left(s-3r\right)$$

Pahekotia te rs me rs, ka 2rs.

$$-r^{2}+2rs-s\left(s-3r\right)$$

Whakamahia te āhuatanga tohatoha hei whakarea te s ki te s-3r.

$$-r^{2}+2rs-\left(s^{2}-3sr\right)$$

Hei kimi i te tauaro o s^{2}-3sr, kimihia te tauaro o ia taurangi.

$$-r^{2}+2rs-s^{2}+3sr$$

Pahekotia te 2rs me 3sr, ka 5rs.

$$-r^{2}+5rs-s^{2}$$

Whakaroha

$$-r^{2}+5rs-s^{2}$$

Ngā Upane Otinga

Whakamahia te āhuatanga tohatoha hei whakarea te r ki te r+s.

$$r^{2}+rs-2r^{2}+rs-s\left(s-3r\right)$$

Pahekotia te r^{2} me -2r^{2}, ka -r^{2}.

$$-r^{2}+rs+rs-s\left(s-3r\right)$$

Pahekotia te rs me rs, ka 2rs.

$$-r^{2}+2rs-s\left(s-3r\right)$$

Whakamahia te āhuatanga tohatoha hei whakarea te s ki te s-3r.

$$-r^{2}+2rs-\left(s^{2}-3sr\right)$$

Hei kimi i te tauaro o s^{2}-3sr, kimihia te tauaro o ia taurangi.

$$-r^{2}+2rs-s^{2}+3sr$$

Pahekotia te 2rs me 3sr, ka 5rs.

$$-r^{2}+5rs-s^{2}$$