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2 years ago

Complete the square: x^2-8x+21=6 Please show work

2 answers:

7 0

........................

mina [271]2 years ago

5 0

Answer:

x=5 and 3

Step-by-step explanation:

x^2-8x+21=6

x^2-8x+21+16=6+16

(x-4)^2=1

(x-4)=±1, x=5 and 3

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