Lesson 2: Addition and Subtraction of Polynomials

Question 1

(5a2 + 4ab – 3b2) – (–5ab + 4b2 + 3a2) = a2 + ab + ( b2)

Revolt · Accepted Answer

(5a2 + 4ab – 3b2) – (–5ab + 4b2 + 3a2) =: 2; (5a2 + 4ab – 3b2) – (–5ab + 4b2 + 3a2) =: 9; (5a2 + 4ab – 3b2) – (–5ab + 4b2 + 3a2) =: -7

Question 2

Which example illustrates the associative property of addition for polynomials?

Revolt · Accepted Answer

[(2x2 + 5x) + (4x2 – 4x)] + 5x3 =(2x2 + 5x) + [(4x2 – 4x) + 5x3]

Question 3

Which expression represents the width of the framed picture?x + 8x² + 82x + 88x²

Revolt · Accepted Answer

2x + 8

Question 4

) inches

Revolt · Accepted Answer

36

Question 5

–16t2 + t

Revolt · Accepted Answer

"20"; "4"; 20

Question 6

(–b3 + 3b2 + 8) – (? – 5b2 – 9) = 5b3 + 8b2 + 17? = –6b³–4b³4b³6b³

Revolt · Accepted Answer

–6b³

Question 7

Anna subtracted (7n2 – 5n + 6) from (5n2 + 4n – 9) as shown below.What error did Anna make?

Revolt · Accepted Answer

She made a mistake when finding the additive inverse of (7n2 – 5n + 6).

Question 8

(0.4k3 – 2.5k) – (2.4k3 + 3k2 – 1.2k) =

Revolt · Accepted Answer

–2k3 – 3k2 – 1.3k

Question 9

(5a2 + 4ab – 3b2) – (–5ab + 4b2 + 3a2) = a2 + ab + ( b2)

Revolt · Accepted Answer

⇒ 2: -7

Question 10

Which expression represents the width of the framed picture?x + 8x² + 8✔ 2x + 88x²

Revolt · Accepted Answer

2x + 8

Lesson 2: Addition and Subtraction of Polynomials Answers