Write the equation of the parabola that passes through the points (−5,0), (−2,9), and (3,0).Write your answer in the form y=a(x−p)(x−q), where a, p, and q are integers, decimals, or simplified fractions.
Q. Write the equation of the parabola that passes through the points (−5,0), (−2,9), and (3,0).Write your answer in the form y=a(x−p)(x−q), where a, p, and q are integers, decimals, or simplified fractions.
Identify x-intercepts: We have the points (−5,0), (−2,9), and (3,0). The points where the parabola crosses the x-axis are (−5,0) and (3,0), which means these are the x-intercepts of the parabola. Therefore, we can identify the values of p and q as p=−5 and q=3.
Substitute p and q: Using the standard form of a parabola y=a(x−p)(x−q), we substitute p=−5 and q=3 into the equation to get y=a(x+5)(x−3).
Find value of a: Now we need to find the value of a. We can use the point (−2,9) to do this. Substituting x=−2 and y=9 into the equation y=a(x+5)(x−3) gives us 9=a(−2+5)(−2−3).
Solve for a: Solving the equation 9=a(3)(−5) gives us 9=−15a. Dividing both sides by −15, we get a=−159, which simplifies to a=−53.
Write final equation: Now that we have found a=−53, we can write the final equation of the parabola. Substituting a=−53 into y=a(x+5)(x−3), we get y=−53(x+5)(x−3).
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