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16 July, 15:25

Which of the following represent the area of a rectangle whose length is 5x-3 with is x + 7

A. 5x^2-21

B. 5x^2+9x-21

C. 5x^2+32x-21

D. 5x^2-32x-21

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Answers (2)
  1. 16 July, 15:39
    0
    Area of Rectangle

    = L x B

    = (5x - 3) (x + 7)

    = 5x² + 35x - 3x - 21

    = 5x² + 32x - 21

    ∴ Answer is C.
  2. 16 July, 15:42
    0
    Area of a rectangle equals l*w

    (5x-3) (x+7)

    Distribution

    5x2+35x-3x-21

    5x2+32x-21

    The answer is c
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