Cbencomo
Cbencomo Cbencomo
  • 26-08-2019
  • Mathematics
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(2ab-7a-4) - (7ab-4)
Hi plz help

Respuesta :

kosala1478
kosala1478 kosala1478
  • 26-08-2019

Step-by-step explanation:

(2ab-7a-4) - (7ab-4)

= 2ab - 7a - 4 - 7ab +4

(-) × (-) = (+)

(-) × (-) = (+)-(-4)= +4

then 4 will be cancelled

= 2ab - 7ab - 7a

= -5ab -7a

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