Respuesta :

bhacr013316

Answer:

9.48683298051

Step-by-step explanation:

square root

ghanami

Answer:

-10  and 9

Step-by-step explanation:

hello :

let x the number(s) you have this equation : x²+x=90

x²+x-90 =0

(x+10)(x-9) =0

x+10=0  or x-9=0

x= -10 or x=9

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