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Write the equation of the parabola that passes through the points (5,0(-5,0), (7,40(-7,-40), and (2,0(-2,0).\newlineWrite your answer in the form y=a(xp)(xq)y = a(x - p)(x - q), where aa, pp, and qq are integers, decimals, or simplified fractions.

Full solution

Q. Write the equation of the parabola that passes through the points (5,0(-5,0), (7,40(-7,-40), and (2,0(-2,0).\newlineWrite your answer in the form y=a(xp)(xq)y = a(x - p)(x - q), where aa, pp, and qq are integers, decimals, or simplified fractions.
  1. Identify Intercepts: We have the points (5,0(-5,0), (7,40(-7,-40), and (2,0(-2,0). The points (5,0(-5,0) and (2,0(-2,0) are the xx-intercepts of the parabola, so they give us the values of pp and qq directly.p=5p = -5 and q=2q = -2.
  2. Write Parabola Equation: Now we can write the equation of the parabola in the form y=a(xp)(xq)y = a(x - p)(x - q) using the values of pp and qq we found.\newliney=a(x+5)(x+2)y = a(x + 5)(x + 2)
  3. Find Value of a: Next, we need to find the value of aa. We will use the point (7,40)(-7,-40) to do this. Substitute x=7x = -7 and y=40y = -40 into the equation y=a(x+5)(x+2)y = a(x + 5)(x + 2).\newline40=a(7+5)(7+2)-40 = a(-7 + 5)(-7 + 2)
  4. Simplify Equation: Simplify the equation to solve for aa.\newline40=a(2)(5)-40 = a(-2)(-5)\newline40=10a-40 = 10a\newlinea=40/10a = -40 / 10\newlinea=4a = -4
  5. Final Equation: Now that we have found a=4a = -4, we can write the final equation of the parabola.y=4(x+5)(x+2)y = -4(x + 5)(x + 2)

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