which of the following are the solutions to the equation below? Check all that apply.
(2x-3)^2=1
a.-1
b.3
c.-2
d.1/3
e.2
f.1
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OpenStudy (anonymous):
Substitute all the values into x and see if you get 1, if you did, then that value of x is a solution to the equation
OpenStudy (anonymous):
B. and D. are out of the list
OpenStudy (anonymous):
Still got more out of list
OpenStudy (anonymous):
No
OpenStudy (mathmate):
Since there are multiple solutions, you are better off finding the solutions, instead of testing all 5 choices.
\( (2x-3)^2 =1 \\
=> \\
(2x-3)=\pm 1
\)
So solve for
\( 2x-3=1\\
and\\
(2x-3)=-2
\)
to find your answer.
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OpenStudy (mathmate):
Sorry, last one should read:
\( (2x-3)=-1\)
OpenStudy (anonymous):
No
OpenStudy (anonymous):
c nd e??
OpenStudy (mathmate):
Did you solve for x in the two equations I posted earlier?
What did you get?
OpenStudy (anonymous):
2,-2
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OpenStudy (mathmate):
Can you check your second answer?
OpenStudy (anonymous):
wait it -1 got confussed
OpenStudy (anonymous):
its a nd e
OpenStudy (mathmate):
Sure it's -1?
OpenStudy (mathmate):
Are you sure the second answer is -1?
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OpenStudy (mathmate):
Solve
\((2x−3)=−1\)
OpenStudy (anonymous):
for the second equation there both - so its +1
OpenStudy (mathmate):
So what are the solutions of the equations?
OpenStudy (anonymous):
i mean -2
OpenStudy (anonymous):
ohhhhh d nd e
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OpenStudy (anonymous):
No
OpenStudy (mathmate):
For the second equation:
\((2x−3)=−1\\
2x=-1+3=2\\
x=1\)
Do you agree?
OpenStudy (anonymous):
isnt it -1
OpenStudy (mathmate):
Show me how you got -1, please.
OpenStudy (anonymous):
-+=- right
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OpenStudy (mathmate):
@romanortiz65 you still there?
OpenStudy (anonymous):
yeah
OpenStudy (mathmate):
So can you show me how did you get x=-1 from
\((2x−3)=−1\)
This will help you avoid future errors.
OpenStudy (anonymous):
2x-3=-1
+3 +3
2x=-2
x=-1
OpenStudy (anonymous):
-1 + 3 = 3 - 1 = 2
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OpenStudy (mathmate):
On the right hand side, -1+3 equals -2.
I will show this on the number line:
|dw:1376418957890:dw|
OpenStudy (mathmate):
Sorry again,
-1+3=+2
OpenStudy (mathmate):
So what are the two solutions that we have found?
OpenStudy (anonymous):
-1, 2
OpenStudy (anonymous):
A,E
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OpenStudy (anonymous):
No
OpenStudy (anonymous):
what the heck im confffused
OpenStudy (anonymous):
e nd f
OpenStudy (anonymous):
its okay... slow down
OpenStudy (anonymous):
There you go!
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OpenStudy (anonymous):
\[2x = 4\]and \[2x - 3= -1\]Thats how you get E and F