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Its asking to expand and simplify an expression for the area of this rectangle. ​
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37 votes
37 votes
Its asking to expand and simplify an expression for the area of this rectangle. ​

Its asking to expand and simplify an expression for the area of this rectangle. ​-example-1
User Mhbdr
by
2.9k points

2 Answers

13 votes
13 votes

Answer:

(4x-5)(x+4)

  • 4x squared- 16x -5x - 20
  • 4x squared-21x - 20
User Artem Klevtsov
by
3.0k points
24 votes
24 votes

Answer:

4x^2 + 11x - 20

Explanation:

  1. area is width X height
  2. multiply the width (4x - 5) and the height(X + 4)
  3. I always imagine a multiplication grid for this kind of problem, with X and +4 at the top and 4x and -5 going down, and then combine terms
  4. you get 4x^2 + 11x - 20
User Neaox
by
3.1k points
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