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14 October, 09:50

If Y=2X^2-4X-5, what is the value of Y when X = - 3?

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  1. 14 October, 12:57
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    Y = 2x² - 4x - 5

    substitute x = - 3 to the equation

    y = 2 · (-3) ² - 4 · (-3) - 5 = 2 · 9 + 12 - 5 = 18 + 12 - 5 = 30 - 5 = 25

    Answer: y = 25
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