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vondergeysts
@vondergeysts
July 2022
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х(х + 3)=10
х(х - 1)=42
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bronislavdobro
Х(х + 3)=10
x²
+3 x - 10 = 0
D = 32
- 4 • 1 • (-10) = 49
х₁=2
х₂= -5<0
х(х - 1)=42
х²-х=42
х²-х-42=0
D = (-1)2
- 4 • 1 • (-42) = 169
х₁=7
х₂= -6<0
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Answers & Comments
x² +3 x - 10 = 0
D = 32 - 4 • 1 • (-10) = 49
х₁=2
х₂= -5<0
х(х - 1)=42
х²-х=42
х²-х-42=0
D = (-1)2 - 4 • 1 • (-42) = 169
х₁=7
х₂= -6<0