amysing16 amysing16

05-02-2018
Mathematics

contestada

the area of a rectangular book cover is 4x^2-6x-40. The width of the book cover is 2x-8. what is the length?

Respuesta :

stephthegreat19 stephthegreat19

09-02-2018

Answer:
2x+5

4x^2-6x-40 factor
2(2x+5)(x-4) multiply
(2x+5)(2x-8) = area
2x+5 = length

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