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Mathematics 21 Online
OpenStudy (rz172):

help?

OpenStudy (rz172):

OpenStudy (otherworldly):

that question doesn't make sense

OpenStudy (jiteshmeghwal9):

Distance formula \[\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}\]

OpenStudy (rz172):

yes, but whta do I place in x2 do i put 5 or 2?

OpenStudy (rz172):

is it (2-5)+(2-6)?

OpenStudy (jiteshmeghwal9):

X_2=5 X_1=2 Y_2=6 Y_1=2

OpenStudy (rz172):

Then 5-2 = 3 and 6-2=4 how do I square it?

OpenStudy (rz172):

3 = 1.73 and 4 = 2 so I add that? 3.73?

OpenStudy (rz172):

So is the answer 4?

OpenStudy (jiteshmeghwal9):

\[\sqrt{(5-2)^2+(6-2)^2}\]

OpenStudy (phi):

it does not matter which point is first if you use (2,2) as the first point, then you do 2-5 and 2-6 or you could use (5,6) as the first point, and do 5-2 and 6-2 in this case you get 3 and 4 now square them and add together 3*3 + 4*4

OpenStudy (3mar):

I agree with @phi. I would say that.

OpenStudy (rz172):

Is the answer 4 or 5?

OpenStudy (phi):

what did you get for 3*3 + 4*4 ?

OpenStudy (rz172):

52?

OpenStudy (rz172):

What is *? times?

OpenStudy (phi):

* is how I show "multiply"

OpenStudy (rz172):

So if I square root 52, it is 7.21 and rounding to tenths meaning the answer is 7?

OpenStudy (phi):

what is 3 squared i.e. 3*3 ?

OpenStudy (rz172):

I'm not following? what? 1.73?

OpenStudy (rz172):

Is the answer 5?

OpenStudy (phi):

we are following what jite posted up above \[ \sqrt{(5-2)^2+(6-2)^2} \] inside the square root we have \[ 3^2 + 4^2\] which is the same as \[ 3 \cdot 3 + 4\cdot 4\] what is 3 times 3: \[ 3\cdot 3 \] ?

OpenStudy (rz172):

9

OpenStudy (phi):

now 4*4 ?

OpenStudy (rz172):

16?

OpenStudy (phi):

yes, now we add them 9+16 which is what ?

OpenStudy (rz172):

25.....

OpenStudy (phi):

in other words 3^2 + 4^2 = 9+16= 25 finally we "take the square root" what number times itself is 25 ?

OpenStudy (rz172):

5

OpenStudy (phi):

yes, that means the distance between the two points (2,2) and (5,6) is \[ \sqrt{(5-2)^2+(6-2)^2}= 5 \]

OpenStudy (3mar):

@phi: simply easy clear deserve a medal!

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