X²-64=0
x²=64
x₁=-8 x₂=8
б) х² + 9 = 0.
x²=9
х₁=-3 х₂=3
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X²-64=0
x²=64
x₁=-8 x₂=8
б) х² + 9 = 0.
x²=9
х₁=-3 х₂=3