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1 vote
How many roots does y=3x^2+8 have?

1 Answer

4 votes

Answer:

This quadratic has two unequal, imaginary roots.

Explanation:

y = 3x^2 + 8 is a quadratic function, and (like all quadratics) it has two roots. In this case they happen to be different (unequal), as well as imaginary.

Setting y = 3x^2 + 8 = 0, we get:

3x^2 = -8, or

x^2 = -8/3

Taking the square root of both sides, we get

x = ±i√(8/3) (2 imaginary roots)

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