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serious [3.7K]
3 years ago
13

For what values of m does the graph of y = 3x^2+ 7x + m have two x-intercepts?

Mathematics
1 answer:
qaws [65]3 years ago
8 0

Answer:

m < 49/12

Step-by-step explanation:

The portion of the quadratic formula under the square root sign is the discriminant.

If the discriminant is > 0 then there are two real roots.

b² -4ac > 0

-----------------------------

7² - 4(3)m > 0

49 - 12m > 0

Subtract 49 from both sides

-12m > -49

Divide both sides by -12

(when multiplying or dividing by a negative the inequality must be reversed)

m < 49/12

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