brookelee brookelee

23-01-2018
Mathematics

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I️ don’t understand this

I dont understand this class=

Respuesta :

HenryLCH HenryLCH

23-01-2018

Let x cm be the height of the triangle
then the base =(3x+5)cm
(x*(3x+5))/2=69
3x^2+5x-138=0
x=6 or -23/3(rejected)
Therefore, height= 6cm, base=23cm

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