Whakaoti i te f(a+2)=a+2^3-2(a+2^2)+(a+2)-9

$$f ( a + 2 ) = a + 2 ^ { 3 } - 2 ( a + 2 ^ { 2 } ) + ( a + 2 ) - 9$$

Aromātai

$$-7$$

Ngā Upane Otinga

Tātaihia te 2 mā te pū o 3, kia riro ko 8.

$$a+8-2\left(a+2^{2}\right)+a+2-9$$

Tātaihia te 2 mā te pū o 2, kia riro ko 4.

$$a+8-2\left(a+4\right)+a+2-9$$

Whakamahia te āhuatanga tohatoha hei whakarea te -2 ki te a+4.

$$a+8-2a-8+a+2-9$$

Pahekotia te a me -2a, ka -a.

$$-a+8-8+a+2-9$$

Tangohia te 8 i te 8, ka 0.

$$-a+a+2-9$$

Tangohia te 9 i te 2, ka -7.

$$-a+a-7$$

Pahekotia te -a me a, ka 0.

$$-7$$

Tauwehe

$$-7$$