karinarevenko90 karinarevenko90

26-03-2020
Mathematics

contestada

What is the positive root of the equation x^2 -2x=120?

Respuesta :

ghanami ghanami

07-04-2020

Answer:

x=12

Step-by-step explanation:

hello :

x² -2x=120 equivalent : x² -2x+1=120+1

(x-1)² = 121 means : (x-1)² = 11²...(*)

if : x ≥0 (*) equivalent : x-1=11 so : x=12

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