Consider the polynomial –2y + 7y⁴ – 9. Arrange the terms of the polynomial in descending powers of y.

考慮多項式 –2y + 7y⁴ – 9。按下列次序排列多項式的項。按 y 的降冪次序排列。

Consider the polynomial 2y³ – y + 11 – 10y⁴. Arrange the terms of the polynomial in ascending powers of y.

考慮多項式2y³ – y + 11 – 10y⁴。按下列次序排列多項式的項。

按y的升冪次序排列。

Find the value of the polynomial 8a + 1 when a = 0.

當a = 0時 , 求多項式 8a + 1。

Find the value of the polynomial 3x + 4x² – 1 when x=1.

當 x=1 時 , 求多項式 3x + 4x² – 1 。

Find the value of the polynomial 2y + y³ – 9 – y² when y = 3.

當 y = 3 時 , 求多項式 2y + y³ – 9 – y² 。

Find the value of the polynomial 3x – 2 when x = 1.

當 x = 1 時 , 求多項式 3x – 2 。

Find the value of the polynomial 5y³ – 4 – 2y² when y = –1.

當 y = –1 時 , 求多項式 5y³ – 4 – 2y² 。

Simplify the following expression:

(x – 3) + (x – 6)

化簡下列各式:

(x – 3) + (x – 6)

Simplify the following expression:

(2x – 5y) + (3y + 15x)

化簡下列各式:

(2x – 5y) + (3y + 15x)

simplify the following expression:

(1 – 2x²) + (3x² – 15)

化簡下列各式:

(1 – 2x²) + (3x² – 15)

Simplify the following expression:

(2x + 3) – (x – 1)

化簡下列各式:

(2x + 3) – (x – 1)

Simplify the following expression:

(x + 6y) – (y + 5x)

化簡下列各式:

(x + 6y) – (y + 5x)

Simplify the following expression:

(x³ – 2x – 9) – (16 – 3x³)

化簡下列各式:

(x³ – 2x – 9) – (16 – 3x³)

Simplify the following expression:

(1 – 2x²) + (–3x² + x + 15)

化簡下列各式:

(1 – 2x²) + (–3x² + x + 15)