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Question and answer
Solve in Q in the equation 2+3x=7
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Question
Asked 4/25/2013 4:57:16 AM
Updated 5/7/2014 5:32:52 PM
5 Answers/Comments
This conversation has been flagged as incorrect.
Flagged by
andrewpallarca
[5/7/2014 4:50:15 PM]
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Solve in Q in the equation 2+3x=7
Original conversation
User:
Solve in Q in the equation 2+3x=7
Weegy:
In answer to Your Question: Solution Set would be the values found for x%5B1%5D , [ x%5B2%5D x%5E23x=7 Written as an Quadratic Equation: x%5E23x7=0 . Using the Quadratic Formula to Solve: x+=+%28b+%2B+sqrt%28+b%5E24%2Aa%2Ac+%29%29%2F%282%2Aa%29+ . Solved by pluggable solver: SOLVE quadratic equation with variable Quadratic equation ax%5E2%2Bbx%2Bc=0 (in our case 1x%5E2%2B3x%2B7+=+0) has the following solutons: x%5B12%5D+=+%28b%2Bsqrt%28+b%5E24ac+%29%29%2F2%5Ca For these solutions to exist, the discriminant b%5E24ac should not be a negative number. First, we need to compute the discriminant b%5E24ac: b%5E24ac=%283%29%5E24%2A1%2A7=37. Discriminant d=37 is greater than zero. That means that there are two solutions: +x%5B12%5D+=+%28 3%2Bsqrt%28+37+%29%29%2F2%5Ca. x%5B1%5D+=+%28%283%29%2Bsqrt%28+37+%29%29%2F2%5C1+=+4.54138126514911 x%5B2%5D+=+%28%283%29sqrt%28+37+%29%29%2F2%5C1+=+1.54138126514911 Quadratic expression 1x%5E2%2B3x%2B7 can be factored: 1x%5E2%2B3x%2B7+=+1%28x4.54138126514911%29%2A%28x 1.54138126514911%29 Again, the answer is: 4.54138126514911, 1.54138126514911. Here's your graph: graph%28+500%2C+500%2C+10%2C+10%2C+20%2C+20%2C+1%2Ax%5E2%2B3%2Ax%2B7+%29 ]
Expert answered
Tiffny
Points 40
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Question
Asked 4/25/2013 4:57:16 AM
Updated 5/7/2014 5:32:52 PM
5 Answers/Comments
This conversation has been flagged as incorrect.
Flagged by
andrewpallarca
[5/7/2014 4:50:15 PM]
New answers
Rating
3
andrewpallarca
M
2 + 3x = 7;
3x = 7  2;
3x = 5;
x = 5/3
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Added 5/7/2014 4:50:13 PM
This answer has been confirmed as correct and helpful.
0
tektek10
2 + 3x = 7
3x = 7  2
x = 5/3
Log in for more information.
Added 5/7/2014 4:08:42 PM
Comments
andrewpallarca
M
tektek10, please make sure to not miss a single step on solutions for equations. It's important that a solution is complete so the user would understand clearly.
Added 5/7/2014 4:51:04 PM
tektek10
Okay, I thought that dividing the variable on the right side right after subtraction would be enough as answer.
Added 5/7/2014 5:24:00 PM
andrewpallarca
M
Yes, but it you didn't show the answer to 7  2 , you skipped to division right away, but it's not a big deal.
It would just be more helpful to show complete solutions.
Added 5/7/2014 5:32:52 PM
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