chloebanafosmx76 chloebanafosmx76

11-08-2017
Mathematics

contestada

what is AB? I don't get this problem. Help please!

what is AB I dont get this problem Help please class=

Respuesta :

musiclover10045 musiclover10045

11-08-2017

AB = x

6^2 = x * (x+5)

36 = x^2 +5x

x^2 +5x - 36 = 0

(x-4) (x+9) = 0

x = 4, x = -9

it can't be a negative so x = 4

AB = 4 cm

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