Next, factor the trinomial completely. The equation becomes .
The roots of the function are .
Sanjay graphs a quadratic function that has x-intercepts of –3 and 7. Which functions could he have graphed? Check all that apply.g(x) = x2 – 4x – 21g(x) = (x – 3)(x + 7)g(x) = 3x2 – 12x – 63g(x) = –(x + 3)(x – 7)g(x) = x2 + 4x – 21
The graph of a quadratic function touches, but does not cross, the x-axis at x = 4. Which function represents this situation?
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