Question

x^2 + 4=104
what is x? There will be a positive and negative number.

Answer 1

\[x^2=104-4=100\Rightarrow x^2=100\Rightarrow x=\pm\sqrt{100}=\pm10\]

Answer 2

I am so confused

Answer 3

x^2 + 4=104
Subtract 4 from both sides.

x^2 = 100

What number times itself is equal to 100?

@Kaila_111697

Answer 4

Post what you think it is.

Answer 5

10

Answer 6

If I had asked what number times itself equals 25, you would have said 5 because 5 times 5 equals 25.

Then, I would have said but there is also a negative number that you can multiply times itself and get 25. You would have said -5 because -5 times -5 = 25.

Answer 7

@Kaila_111697 That is correct. What about the negative number.

Answer 8

But it is not 100 its 104

Answer 9

x^2+4=104
x^2=104-4=100
x=sqrt100=\[\pm10\]

Answer 10

@Kaila_111697

Look at the equation: x^2 + 4=104

We subtracted the 4 from both sides to get x^2 = 100.

Answer 11

oh so 10 and -10

Answer 12

But 10 satisfies the equation: x^2 + 4=104 because 10*10 + 4 = 100 +4.

Answer 13

>>oh so 10 and -10

Yes.

Answer 14

Thank you so much

Answer 15

Glad to help.