What are the zeros of the parabola whose equation is y = x2 + 8x + 15

Mathematics

1 answer:

Sedbober [7]2 years ago

6 0

9514 1404 393

Answer:

(1) -5 and -3

Step-by-step explanation:

Descarte's rule of signs tells you the lack of sign changes among the coefficients means there are <em>no positive real roots</em>. That eliminates all answer choices except the first one.

If you want to go to the trouble, you can factor the equation:

y = (x +3)(x +5)

These factors are zero when x = -5 and x = -3.

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