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Oksana_A [137]
2 years ago
15

-

Mathematics
1 answer:
dangina [55]2 years ago
3 0

Answer:

(x-3)^2  =21

Step-by-step explanation:

~~~~~~~x^2-6x-12=0\\\\\implies x^2 -6x +9-21=0 \\\\\implies x^2 -2\cdot x \cdot  3 +3^2=21\\\\\implies (x-3)^2  =21

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