SOLUTION: Hi I need a bit of help.
Find a negative number whose square is 12 more than itself.
X represents the number.
I got -(x)+12=x^2 or x+12=x^2
Do I put the - and the brackets?
F
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-> SOLUTION: Hi I need a bit of help.
Find a negative number whose square is 12 more than itself.
X represents the number.
I got -(x)+12=x^2 or x+12=x^2
Do I put the - and the brackets?
F
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Question 1171384: Hi I need a bit of help.
Find a negative number whose square is 12 more than itself.
X represents the number.
I got -(x)+12=x^2 or x+12=x^2
Do I put the - and the brackets?
For the first equation with brackets I get x=-4 but for the second equation without brackets I get x=-3.
Thanks Found 2 solutions by Boreal, MathTherapy:Answer by Boreal(15235) (Show Source):
You can put this solution on YOUR website! (-x)^2=-x+12
x^2-x-12=0
and x=4 and -3
only -3 is negative
and -3 squared is 9, 12 more than -3.
-
4^2 is 16, 12 more than 4. But 4 is not negative.
(-4)^2 is 16, 20 more than -4.
-
Answering your question, the - goes in the brackets. The whole negative number is being squared.
-
The answer is -3.
You can put this solution on YOUR website!
Hi I need a bit of help.
Find a negative number whose square is 12 more than itself.
X represents the number.
I got -(x)+12=x^2 or x+12=x^2
Do I put the - and the brackets?
For the first equation with brackets I get x=-4 but for the second equation without brackets I get x=-3.
Thanks
Note that the other person who responded has the WRONG SETUP!
You DON'T place a "-" in front of the variable. So, with the number being N, the equation is:
(N + 3)(N - 4) = 0
Number or OR N = 4 (ignore)
