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Find y if x^2-6x+4=(x-3)^2+y

A 9
B -5
C 3
D 5
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2 Answers

X^2-6x+4=(x-3)^2+y
x^2-6x+4=x^2-6x+9+y
subtract (x^2-6x) from both sides
4=9+y
4-9=y
-5=y
B is the answer
 
Agree with above answer. y=-5