SOLUTION: How many real number solutions does the quadratic equation 2x^2+7x-9 have?
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Question 967295: How many real number solutions does the quadratic equation 2x^2+7x-9 have?
Answer by ikleyn(52778) (Show Source): You can put this solution on YOUR website!
Calculate the discriminant of the quadratic equation
= .
It is d = = = = . . .
You even do not need to calculate the exact value to answer the question: it is clear that the discriminant is a positive number.
Hence, the given quadratic equation has two real roots.
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