Write the equation of the parabola that passes through the points (−5,0), (−7,−40), and (−2,0).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), (−7,−40), and (−2,0).Write your answer in the form y=a(x−p)(x−q), where a, p, and q are integers, decimals, or simplified fractions.
Identify Intercepts: We have the points (−5,0), (−7,−40), and (−2,0). The points (−5,0) and (−2,0) are the x-intercepts of the parabola, so they give us the values of p and q directly.p=−5 and q=−2.
Write Parabola Equation: Now we can write the equation of the parabola in the form y=a(x−p)(x−q) using the values of p and q we found.y=a(x+5)(x+2)
Find Value of a: Next, we need to find the value of a. We will use the point (−7,−40) to do this. Substitute x=−7 and y=−40 into the equation y=a(x+5)(x+2).−40=a(−7+5)(−7+2)
Simplify Equation: Simplify the equation to solve for a.−40=a(−2)(−5)−40=10aa=−40/10a=−4
Final Equation: Now that we have found a=−4, we can write the final equation of the parabola.y=−4(x+5)(x+2)
More problems from Write a quadratic function from its x-intercepts and another point