Question

Dont understand this problem: What are the solutions to x^2 = 18x. Been stuck for a while on this

Answer 1

x . x = 18 x
so x( x - 18 ) = 0

Answer 2

the options are:

A) all real numbers
B) no solutions
C) x = 0, x=-3
D) x=0, x=3

Answer 3

which one would it be?

Answer 4

E) none of the above

Answer 5

theres no E...
duhh

Answer 6

this is why i dislike multiple choice, because people dont do the math

Answer 7

i just dont know how to

Answer 8

like i know x=0 but would it be C or D..where does the negatives come in?

Answer 9

we start with
x^2 = 18x

moving everything over to 1 side
x^2-18x=0

now, use the distributive property of multiplication to factor out an x

x(x-18)=0

now, using the zero property of multiplication, we can conclude either x is equal to 0 or x-18 is equal to 0
giving us the 2 nice equations

x=0 and x-18=0

we look at x-18=0 because its the only one thats unsolved

move the 18 over to the right
x=18

Answer 10

i told you, the answer is not there

Answer 11

so it would be no solutions?

Answer 12

no....
its E) none of the above

Answer 13

i solved it out, showed you the 2 solutions.....

gah

Answer 14

i understand..it is just that there is no E...

Answer 15

then your book/teacher/website/problem/answer
made a typo

Answer 16

ohh..ok thanks so much..will ask about it tmrw!

Answer 17

or you didnt give us the correct problem or solutions

Answer 18

what does all real numbers mean?

Answer 19

could that be the answer?

Answer 20

"completeidiot" is right. There is an issue with the question and/or answers provided.
And "all real numbers" refers to every number imaginable, positive or negative. The answer(s) to this are only x=0 and x=18.
Example: What are the solution(s) to x + 3 = x + 3 ?
All real numbers. Because you can plug ANY number into x and the equation will be true.

Answer 21

thanks so much!