anonymous
  • anonymous
need help right now please
Algebra
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
The length of a rectangle is (4x^2 + 2x - 1) units, and its width is (3x^3 - x + 4) units. Part A: What is the area of the rectangle? Show your work. (5 points) Part B: Does the answer for Part A show that polynomials are closed under an operation? Justify your answer. (3 points) Part C: What is the degree and classification of the expression obtained in Part A? (2 points)
anonymous
  • anonymous
hello?
welshfella
  • welshfella
(4x^2 + 2x - 1) * (3x^3 - x + 4)

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anonymous
  • anonymous
this is for part A?
welshfella
  • welshfella
yes multiply second parentheses by 4x^2 , then by + 2x, then by -1. Then simplify like terms.
welshfella
  • welshfella
the first term will be 12x^5
anonymous
  • anonymous
wait whats part B?
anonymous
  • anonymous
@welshfella
welshfella
  • welshfella
the result of the multiplication will be another polynomial supporting the fact that polynomials are close under multiplication.

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