Addition and Subtraction of Polynomials Answers
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Use what you know about addition and subtraction of polynomials to find the missing term represented by the question mark in each equation.(–4x2 + 6x + 3) + (8x + 5 + ?) = 2x2 + 14x + 8? = -6x² -2x² 2x² ✔ 6x²
Answers:
Selection 1:6x²
Selection 2:–6b³
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Kendall says the sum of (6x2 + 4xy + 2y2) and (4x2 – 2xy – 3y2) is (10x2 + 2xy – 5y2). What error did Kendall make?
A
He combined the like terms 6x2 and 4x2 incorrectly.B
He combined the like terms 4xy and –2xy incorrectly.C
He combined the like terms 2y2 and –3y2 incorrectly.D
He subtracted the polynomials instead of adding.2
(–b3 + 3b2 + 8) – (? – 5b2 – 9) = 5b3 + 8b2 + 17? = ✔ –6b³–4b³4b³6b³
A
✔ –6b³B
–4b³C
4b³D
6b³2
Anna subtracted (7n2 – 5n + 6) from (5n2 + 4n – 9) as shown below.What error did Anna make?
A
She did not align like terms correctly.B
She forgot to use the additive inverse of (5n2 + 4n – 9).C
She made a mistake when finding the additive inverse of (7n2 – 5n + 6).Did you find these answers helpful?
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