Question

If the square of a certain number added to its square is 30.Find the number.

Answer 1

\[x+x^2=30\]

Answer 2

30^2

Answer 3

x^2+x-30=0
(x+6)(x-5)=0
x-5=0

Answer 4

and x+6=0

Answer 5

isn't it supposed to equal 30?

Answer 6

the number when added to its square is supposed to be equal to 30.

Answer 7

I thought it was x^2+x^2=30 ....O.o

Answer 8

so shouldn't it be x^2+x^2=30 because it says added to its square is 30 which mean equals 30?

Answer 9

@dumbcow

Answer 10

@Directrix

Answer 11

"added to its square" i guess they mean the square of the number squared
--> (x^2)^2 = x^4

x^4 + x^2 = 30
x^4 + x^2 -30 = 0
(x^2 -5)(x^2 +6) = 0
...

Answer 12

isn't the square of a no. x^2???? O.o

Answer 13

haha yes, but "it" is referring to the square of a number

Answer 14

I see...

Answer 15

oh

Answer 16

I learn something today..

Answer 17

Hmmmmm.....i still don't get it -_-

Answer 18

we need translators for some of the word problems out there....its not english class gosh textbook writers c'mon

Answer 19

lets assume x is already some square and its added it its square.

Answer 20

why do u have to assume that????????? O.o

Answer 21

blame my teacher she write these silly grammar problems

Answer 22

Ok, lets not assume, lets take it for a fact.

Answer 23

I got it ...I got it ^_^

Answer 24

Makes me chuckle

Answer 25

but still the solution doesnt make sense lol

Answer 26

2 of the answers are imaginary, so yes those don;t make sense
but the other 2 are +-sqrt5

Answer 27

yeah ^

Answer 28

yea..u can subtitude x^2 with ''t'' and then solve it as a second grade equation

Answer 29

I will ask my silly teacher about solving this problem

Answer 30

ask her is +-sqrt5 is correct.