Question

someone please help me;(

Answer 1

what do you need help with?

Answer 2

combining like terms

Answer 3

give an example

Answer 4

ok 3k-7k^2+k+k+13k^2

Answer 5

you have 2 sets of 'like' terms, those raised to the 2 power and thus without an exponent

Answer 6

so you need to combine the 3k, +k, and the +k
then combine -7k^2 and +13k^2

Answer 7

remember that the sign directly in front of the number or variable is attached to that number or variable

Answer 8

what do you get doing it this way?

Answer 9

5k+6k^2?

Answer 10

exactly, because 3K+k+k = 5k
and 13k^2-7k^2 = 6k^2
notice both are positive

Answer 11

so because both are positive its an addition sign? so if one was negative and one was positive it would be a subtraction sign?

Answer 12

yes

Answer 13

as you study a little more math, you will learn that positive and + are the same thing, likewise with negative and -

Answer 14

yeah i know that ..

Answer 15

ok so like also i need help on this...

evaluate.. 3r^2 - 4r
r=-1

Answer 16

can i help with anything else?

Answer 17

ok

Answer 18

3(-1)^2-4(-1)
remember that a negative * negative = positive, so (-1)^2 is equal to (-1)*(-1)=1
so you have
3*(1) +4 = 3+4=7

Answer 19

likewise (-4)*(-1)=4

Answer 20

so its like 3-(-4) which is equal to 7 also

Answer 21

yes, because 3-(-4)=3-1*(-4)=3+4=7

Answer 22

ok if it says -p+2m and the m=-9 AND P=-10 then would you make the p positive or keep it negative?

Answer 23

-(p)+2(m)
=-(-10)+2(-9)
=10-18
=-8

Answer 24

so when its like this -(-10) you make it positive

Answer 25

yes, -(-10) = -1*(-10)
back to a negative * negative = positive

there is an assumed 1 whenever you have a sign then (), so
+(x) = +1*(+x)
or
-(x) = -1*(+x) =-x
or
-(-x) = -1*(-x) = x

Answer 26

ok thanks so much you helped me in ALOT ok and one more thinglets say i have 13-(-6) can i do keep the number change the - to posotive and change the -6 to positive to make it 13 + 6 to give me 19

Answer 27

you bet, and your welcome

Answer 28

have a good night, and enjoy your studies