Mathematics

Mathematics, 17.11.2020 18:30, ooof3

Which of the following are quadratic equations? x2 + 3x = -9

9x2 = y2

7.x2 – 9=2? + – 12

(3x – 5) (3x + 5) = 0

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Do you know the correct answer?

Which of the following are quadratic equations? x2 + 3x = -9

9x2 = y2

7.x2...

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