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17 November, 12:09

Without his pencil or calculator, Joey knows that 2x³+3x² - 1 = 0 has at least one real solution. How does he know?

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  1. 17 November, 15:12
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    Answer: Find the discriminant

    Check explanation

    Step-by-step explanation:

    b^2-4ac

    if it is equal to 0 there is no solution

    Greater then 0 there is 2 real solution

    Less then 0 there is 1 real

    3^2-4 (2*-1)

    9-4 (-2)

    9 (8)

    72 there is at least one real solution
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