Page 131 - Math Course 2 (Book 1)

Perfect Square Trinomials

Your Turn!
Use the Square Root Property to Solve
Solve Equations with Repeated Factors Equations

2
2
Solve 9x – 30x + 25 = 0. Solve the equation (x – 4) = 25. Check your
solution.
3 { {
5
A. A. {–1, 9}
{ { B. {–1}
5
B. – 3 C. {9}
D. {0, 9}
C. {0}

D. {–5} Answer

Answer

Real World Example

PHYSICAL SCIENCE
An egg falls from a window that is 10 feet above
the ground. A model for the height h in feet of an
object dropped from an initial height of h feet is
O
2
h = –16t + h , where t is the time in seconds after
O
the object is dropped. Use this model to determine
approximately how long it took for the egg to reach Solve the equation (x – 5) = 15. Check your
2
the ground.
solution.
A. 0.625 second
B. 10 seconds A. {–5 + 15 }
C. 0.79 second
D. 16 seconds B. {5 + 15 }
C. {20}
Answer
D. {10}

Answer

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