Question

please help

Answer 1

\(\sf\Large (3a^3-7a^2+a)-(6a^3-4a^2-8)\)

what is \(\sf\Large 3a^3-6a^3\) ??

Answer 2

ok so its 3a

Answer 3

i think

Answer 4

no \(\sf\Large 3a^3-6a^3=-3a^3\)
because 3-6 = -3, the exponent stays the same

Can you do \(\sf\Large -7a^2-4a^2~?\)

Answer 5

11a^2

Answer 6

-11a^2

Answer 7

sorry you are right but i made a mistake :P
It's actually \(\sf\Large -7a^2--4a^2~?\) because of the - before the parenthesis

Answer 8

--4a^2 = +4a^2

Answer 9

oooo ok

Answer 10

So you understand that \(\sf\Large -7a^2--4a^2=-3a^2\) right?

Answer 11

yes

Answer 12

Oke and the last step
what happens when you subtract -8 from a?
So \(\large\sf a -- 8\)

Answer 13

-8a

Answer 14

No that would be multiplying :P
you can't subtract -8 from a so it will just be a+8 (because --8= +8)

So what is the answer?

Answer 15

ok

Answer 16

So do you know what the answer is now?

Answer 17

um i think its d

Answer 18

-3a3-3a2+a+8

Answer 19

Yes that's correct :) \(\Large -3a^3-3a^2+a+8\)

Answer 20

can u help me with a few more

Answer 21

sure

Answer 22

\(\Large (7m-8)^2=(7m-8)(7m-8)\)

Answer 23

so the foil method

Answer 24

yes :)

Answer 25

That's right :P can you also solve it?