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12-02-2021
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contestada

(x+2)(x+10) - (x-5)(x-4)

Respuesta :

SaHerkese SaHerkese

12-02-2021

x.x

10x

2x

20= x.x+12x+20

x.x

-4x

-5x

20=x.x-9x+20

(x.x+12x+20)-(x.x-9x+20)

x.x+12x+20-x.x+9x-20

x.x-x.x=0

12x+9x=21x

20-20=0

Answer:21x

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