lamechildidc
  • lamechildidc
Can somebody please help me :/ Simplify (8j^3 – 10j^2 – 7) – (6j^3 – 10j^2 – j + 12). (I got the first one but I'm not sure) 2j^3 – 20j^2 – j + 5 2j^3 + j – 19 2j^3 – 20j^2 + j – 19 2j^3 – j + 5
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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lamechildidc
  • lamechildidc
@Preetha
lamechildidc
  • lamechildidc
@Michele_Laino
Michele_Laino
  • Michele_Laino
here we have to sum similar terms, and we have to apply the distributive property of multiplication over addition , in order to cancel the parentheses, so we can rewrite your expression as below: \( (8j3 – 10j2 – 7) – (6j3 – 10j2 – j + 12)= 8j3-6j3 -10j2+10j2+j -7-12=...\)

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lamechildidc
  • lamechildidc
Okay i understand that and then i combined like terms and got the first answer
Michele_Laino
  • Michele_Laino
please, first combine like terms, and write what you get
lamechildidc
  • lamechildidc
2j3-20j2+j+5
Michele_Laino
  • Michele_Laino
we have: \(-10j^2+10j^2=0\)
Michele_Laino
  • Michele_Laino
and \(-7-12=-19\)
lamechildidc
  • lamechildidc
So it would be B then?
Michele_Laino
  • Michele_Laino
correct!
lamechildidc
  • lamechildidc
Okay thank you I just got really confused because I know you have to switch the signs but idk lols thanks :)
Michele_Laino
  • Michele_Laino
:)

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