Question: If f(x) = -1, what is x? what point(s) are on the graph of f? f(x) = 2x^2 -x -1 Is x 0? How am I suppose to get the points? :/
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Originally Posted by cokeclassic Question: If f(x) = -1, what is x? what point(s) are on the graph of f? f(x) = 2x^2 -x -1 Is x 0? How am I suppose to get the points? :/ $\displaystyle 2x^2 - x - 1 = -1$ $\displaystyle 2x^2 - x = 0$ $\displaystyle x(2x - 1) = 0$ $\displaystyle x = 0$ and $\displaystyle x = \frac{1}{2}$ so, the points on the graph where f(x) = -1 are (0, -1) and (1/2, -1)
thanks
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