Question

Part 1: Solve each of the quadratic equations below. Show your work. (3 points)

x2 − 25 = 0 and x2 = 2x + 15

Part 2: Describe what the solution(s) represent to the graph of each. (2 points)

Part 3: How are the graphs alike? How are they different? (2 points)

Answer 1

Part 1
A.
x2 − 25 = 0
(x + 5) ( x - 5) = 0
x = 5, - 5

B.
x2 = 2x + 15
x2 - 2x - 15 = 0
(x + 3) ( x - 5) = 0
x = 5, - 3

Part 2
A. the solution of x = 5, - 5 represents y values of the function to equal to zero and the only two
points in the x-axis in which the function crosses.

B. same reasoning, the solution of x = 5, - 3 represents y values of the function to equal to zero and the only two points in the x-axis in which the function crosses.

Answer 2

hope tht helps :)

Answer 3

omg thanks!!
you did that yourself ?!