(х-5)²+(х+7)² = 2х²
х²-10х+25+х²+14х+49=2х²
2х²+4х=2х²-74
4х=-74
х=-74/4= -18,5
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(х-5)²+(х+7)² = 2х²
х²-10х+25+х²+14х+49=2х²
2х²+4х=2х²-74
4х=-74
х=-74/4= -18,5