jacobhimelfarb7 jacobhimelfarb7

16-01-2021
Mathematics

contestada

prove that for any value of x the expression (x-3)(x+7)-(x+5)(x-1) is negative

Respuesta :

senaytech0922 senaytech0922

16-01-2021

Answer:

you can prove it by making the first 2 expression less than the last 2 expressions

Step-by-step explanation:

(x-3)(x+7)-(x+5)(x-1)

(x-3)(x+7) < (x+5)(x-1)

x^2 +4x-21 < x^2 +4x-5

cancel out some terms

then it become -21<-5 which is true

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