radejabarron radejabarron

03-05-2020
Mathematics

contestada

The product of a number and 8 less than the number is –15. Find the number. and plz explain

Respuesta :

mysticchacha mysticchacha

05-05-2020

Answer:

It can be 5 or 3

Step-by-step explanation:

let x = that number

x * (x - 8) = -15

xx - 8x + 15 = 0

xx - 3x - 5x + 15 = 0

x(x - 3) - 5(x - 3) = 0

(x - 5)(x - 3) = 0

then x = 5 or x = 3

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