Solve for y by taking the square root of both sides of the equation. f (z) = +9,z <9

Big Ideas Math A Bridge To Success Algebra 1: Student Edition 2015
1st Edition
ISBN:9781680331141
Author:HOUGHTON MIFFLIN HARCOURT
Publisher:HOUGHTON MIFFLIN HARCOURT
Chapter9: Solving Quadratic Functions
Section9.3: Solving Quadratic Equations Using Sqaure Roots
Problem 15Q
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Can you please explain to me the highlighted graph  in the attached photo - why is it graphed that way? Please be detailed.

Solve for y by taking the square root of both sides of the equation.
F (z) = + 9,z < 9
Tap to view steps.
20
10
20
10
10
20
-10
-20
Tap to hide graph.
Transcribed Image Text:Solve for y by taking the square root of both sides of the equation. F (z) = + 9,z < 9 Tap to view steps. 20 10 20 10 10 20 -10 -20 Tap to hide graph.
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