Завершите решение уравнения: 1) х²+6х+5=0, х²+2*3х+3²-3²+5=0 (х+3)²-4=0 (х+3)²-2²=0 (х+3-2)(х+3+2)=0    ................... 2) х²-12х+20=0 х²-2*6х+6²-6²+20=0 ......................... без дискриминантов
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