AnswersMathematics III AMultiplication of Polynomials

Multiplication of Polynomials — Unit test Answers

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Which statement best describes the polynomial?

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It is in standard form because the exponents are in order from lowest to highest.
B
It is in standard form because the coefficients are in order from lowest to highest.
C
It is not in standard form because the exponents are not in order from highest to lowest.
D
It is not in standard form because it can be further simplified.
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Holly finds that (11m – 13n + 6mn) – (10m – 7n + 3mn) = m – 20n + 9mn. What error did Holly make?

A
She only used the additive inverse of 10m when combining like terms.
B
She added the polynomials instead of subtracting.
C
She only used the additive inverses of –7n and 3mn when combining like terms.
D
She did not combine all like terms.
3

Dylan uses the expressions (x2 – 2x + 8) and (2x2 + 5x – 7) to represent the length and width of his bedroom. Which expression represents the area (lw) of Dylan’s room?

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Which expression shows the sum of the polynomials with like terms grouped together?

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Which polynomial is in standard form?

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Which polynomial is in standard form?

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The length of a rectangular field is represented by the expression . The width of the field is represented by the expression . How much greater is the length of the field than the width?

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8

Which expression is equivalent to ?

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Which expression is equivalent to ?

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The volume of a rectangular prism is given by the formula V = lwh, where l is the length of the prism, w is the width, and h is the height. Which expression represents the volume of the following rectangular prism?

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11

Subtract 15mn – 22m +2n from 14mn – 12m +7n.

A
–mn + 10m + 5n
B
–mn – 34m + 5n
C
–mn – 34m + 9n
D
29mn – 34m + 9n

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