Решите уравнения: г) (x+4)²+(x-8)²=2(8-x)(x+4)
д) 64x³-16x²+x=0
е) x³-3x²-4x+12=0
ж) x³+6x²+12x+9=0
7 класс. без дискриминанта и корней
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