zaniahcurtisp62fho zaniahcurtisp62fho
  • 18-12-2021
  • Mathematics
contestada

When z=−6, evaluate −2(z+9)−(−5) and −2⋅z−2⋅9+5 to show that −2(z+9)−(−5)=−2⋅z−2⋅9+5

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jaydoncarter898
jaydoncarter898 jaydoncarter898
  • 18-12-2021

Ignore this, I posted the wrong answer and I don't know how to delete it.

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claeno claeno
  • 18-12-2021

Answer:

Yes/true

Step-by-step explanation:

-2(z+9)-(-5)=-2⋅z-2⋅9+5

sostituisco la lettera dandogli un valore

=-2(-6+9)-(-5)=-2⋅(-6)-2⋅9+5

calcolo e tolgo le parentesi

=-2⋅3+5=12-18+5

Elimino i termini uguali

=-2⋅3=12-18

Somma e moltiplicazione tra i numeri

=-6=-6

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