Question

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

Answer 1

@Preetha

Answer 2

@Michele_Laino

Answer 3

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:
\( (8j3 – 10j2 – 7) – (6j3 – 10j2 – j + 12)= 8j3-6j3 -10j2+10j2+j -7-12=...\)

Answer 4

Okay i understand that
and then i combined like terms and got the first answer

Answer 5

please, first combine like terms, and write what you get

Answer 6

2j3-20j2+j+5

Answer 7

we have:
\(-10j^2+10j^2=0\)

Answer 8

and \(-7-12=-19\)

Answer 9

So it would be B then?

Answer 10

correct!

Answer 11

Okay thank you I just got really confused because I know you have to switch the signs but idk lols
thanks :)

Answer 12

:)