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

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)   (Show Source): You can put this solution on YOUR website!
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 .
Answer by MathTherapy(10555)   (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: , we get:
With the discriminant being 29, and part of the solution being: , it follows that there are:
Answer by ikleyn(52824)   (Show Source): You can put this solution on YOUR website!
.
The discriminant is d = = .

It is not , as "josgarithmetic" writes.

It is 29.

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