subtract (6r^3 + 8r) - (r^2 - 5r + 6)
Thanks!

Question

subtract (6r^3 + 8r) - (r^2 - 5r + 6)
 Thanks!

anonymous · Answer

distribute the minus
6r^3 + 8r - r^2 + 5r - 6
now combine like terms

anonymous · Answer

14r^5?

anonymous · Answer

you cant combine r^3 with r^2 or r. you can only combine r with r; r^2 with r^2' etc

anonymous · Answer

so 5r^3 + 3r + 6?

anonymous · Answer

you can only combine r^3 with other r^3

maheshmeghwal9 · Answer

how did u get 5r^3 I think u misunderstood something:/

maheshmeghwal9 · Answer

see clearly the question

anonymous · Answer

you cannot breed cats and dogs together. you can only breed dogs with dogs.

maheshmeghwal9 · Answer

& one more thing 
(-) x (-) = (+).

maheshmeghwal9 · Answer

(+) x (-) = (-).
(-) x (+) = (-).
(+) x (+) = (+).
(-) x (-) = (+).

maheshmeghwal9 · Answer

Remember these!

anonymous · Answer

ya

maheshmeghwal9 · Answer

^_^

anonymous · Answer

i think im doind it rong...i keep getting 6r^3 - r^2 + 3r + 6

maheshmeghwal9 · Answer

see clearly the signs
the actual answer is

$$6r^3-r^2+13r-6.$$

maheshmeghwal9 · Answer

thats why i said u to remember those formulae.

anonymous · Answer

......thanks

maheshmeghwal9 · Answer

yw:)
Don't depend on answers.
Try to figure out them urself.
by clearing ur concepts^_^

anonymous · Answer

@homeisawsome, don't worry if you're having trouble now. Everyone does. After a few of these problems, you'll remember the rules of sign (the formulae of mahesh) easily. :)

anonymous · Answer

thanks @Limitless