SOLUTION: Use 3x^2 +3x =21 and use the discriminant to find the number of unique real solutions. Show all calculations. Thanks very much.

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Question 1063601: Use 3x^2 +3x =21 and use the discriminant to find the number of unique real solutions. Show all calculations.
Thanks very much.
Found 3 solutions by josgarithmetic, MathTherapy, ikleyn:
Answer by josgarithmetic(39621) About Me  (Show Source):
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Solved already
https://www.algebra.com/algebra/homework/Functions/Functions.faq.question.1063605.html
https://www.algebra.com/algebra/homework/Functions/Functions.faq.question.1063605.html

The discriminant is 29.

Answer by MathTherapy(10555) About Me  (Show Source):
You can put this solution on YOUR website!
Use 3x^2 +3x =21 and use the discriminant to find the number of unique real solutions. Show all calculations.
Thanks very much.


Using the discriminant: b%5E2+-+4ac, we get: matrix%281%2C5%2C+1%5E2+-+4%281%29%28-+7%29%2C+%22=%22%2C+1+%2B+28%2C+%22=%22%2C+29%29

With the discriminant being 29, and part of the solution being: sqrt%2829%29, it follows that there are:

Answer by ikleyn(52817) About Me  (Show Source):
You can put this solution on YOUR website!
.
The discriminant is d = b%5E2+-+4%2Aa%2Ac = highlight%2829%29.


It is not sqrt%2829%29, as "josgarithmetic" writes.

It is 29.