(2х-3) ²-(2х+3)²=12
4х²-12х+9-4х²-12х-9=12
-24х=12
х=12:(-24)
х=-0,5
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(2х-3) ²-(2х+3)²=12
4х²-12х+9-4х²-12х-9=12
-24х=12
х=12:(-24)
х=-0,5