Which of the following are quadratic equations?
x2 + 3x = -9
9x2 = y2
7.x2...
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
Answers: 2
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