Question

solve:
x^6+7x^3-8=0

Answer 1

could you solve if it was x^2+7x-8=0

Answer 2

Are you capable is a better way to say that

Answer 3

idk what I am doing haha

Answer 4

have you learned the FOIL method

Answer 5

yes

Answer 6

Ok, this is really just the reverse (x+?)(x-?) Don't let the ^6 and ^3 throw you off

Answer 7

so what do I do now

Answer 8

what factors of -8 add up to 7

Answer 9

-1,8 -8,1 -4,2 2,-4 ?

Answer 10

-1,8

Answer 11

correct so now you put those into your factored equation

Answer 12

done. next?

Answer 13

so what do you have

Answer 14

(x^3-1) (x^2+8)

Answer 15

now if you multiply that out what do you get

Answer 16

x^6+8x^3-1x^2-8

Answer 17

correct. your error is that you are multiplying your exponents. when an exponent is multiplied by an exponent you add them. you only multiply when an exponent is raised to a power

Answer 18

ohhh yea

Answer 19

so lets pretend these are exponents, (3)(3) would equal 6 (3)^3 would equal 9

Answer 20

thats the only time you multiply

Answer 21

got it

Answer 22

so now what

Answer 23

what looks out of place in what you "foil"ed