Question

x=8sqrtx

Answer 1

\[x=8\sqrt{x}\]

Answer 2

I know what the answer is just by looking at it, I just forgot how to actually get the answers

Answer 3

what the question?

Answer 4

that is it x=8sqrtx

Answer 5

if you mean the directions it just says solve

Answer 6

square from both sides, that's the 1st step

Answer 7

ok did that

Answer 8

and get x^2 and 8x

Answer 9

now, u have
x^2 = 64x or
x^2 - 64x = 0

Answer 10

oh you would distribute that?

Answer 11

factor out!

x(x-64)=0
solve for x

Answer 12

ok but the answers are 0 and 64

Answer 13

that method gives you 0, 8 and -8

Answer 14

x(x-64)=0

the zeroes satisfies when each factor be zero
x = 0 or
x-64=0 ----> x=64

Answer 15

ahhh okay

Answer 16

so you don't totally factor it out?

Answer 17

you just like half retriceit?

Answer 18

they are cant be 8 and -8

Answer 19

1) Observe the trivial solution x = 0
2) Observe Domain Restrictions in the ORIGINAL expression. \(x \ge 0\)
3) NOW square both sides.

Answer 20

ok do I put that in parenthesis

Answer 21

oh I see, I didn't know that when you square a side with a radical you have to do it to the term in front of the radical and the radical itself right?

Answer 22

yes,
(sqrt(x))^2 = x

Answer 23

Why would "both sides" mean "only part of one side"? The WHOLE thing!

Answer 24

yea I got that TK I know this im talking about the one term with the number in front of the radical like this