(х+5)²=20х
х²+10х+25-20х=0
х²-10х+25=0
По теореме Виета
х₁+х₂ = 10
х₁х₂ = 25
x₁=5
x₂=5
Ответ: 5
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Verified answer
(х+5)²=20х
х²+10х+25-20х=0
х²-10х+25=0
По теореме Виета
х₁+х₂ = 10
х₁х₂ = 25
x₁=5
x₂=5
Ответ: 5