4x^2-9=7
Кажется так.
4x^2 - 9 = 4x^2 - 3^2 = (2x - 3) (2x+3)
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4x^2-9=7
Кажется так.
4x^2 - 9 = 4x^2 - 3^2 = (2x - 3) (2x+3)