Question

solve each equation. state the number and type of roots. x^4-81=0

Answer 1

adding 81 to each side

x^4 = 81

now you need to find x where x * x * x * x = 81

Answer 2

hint: 9 * 9 = 81

Answer 3

i figured that x^4= 81 adnd then im lost

Answer 4

and x * x = 9

Answer 5

so whats x equal to ?

Answer 6

i literally have no clue

Answer 7

im sorry im stupid

Answer 8

x = square root of 9 = ?

Answer 9

what number multiplied by itself gives 9?

Answer 10

obviously3

Answer 11

how do i state the number and type of roots

Answer 12

right - then thats a root of the equation

x^4 = 81
3^4 = 81

so x = 3

theres also another root
x = -3

because (-3)^4 = 81

Answer 13

there are 2 roots (3,-3) which are real roots

Answer 14

because with a square root a positive and negative of something by itself can equal the square root>?

Answer 15

and theyre real because they arent imaginary, correct?

Answer 16

yes

Answer 17

times itself*

Answer 18

ugh thank you

Answer 19

ok

Answer 20

ill probably have more questions