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Sagot :
Answer:
4x^2 + 11x - 20
Step-by-step explanation:
- area is width X height
- multiply the width (4x - 5) and the height(X + 4)
- 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
- you get 4x^2 + 11x - 20
Answer:
(4x-5)(x+4)
- 4x squared- 16x -5x - 20
- 4x squared-21x - 20
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