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IrAKoT666
@IrAKoT666
July 2022
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x(x-5)=36см² помогите решить уравнение
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zhenyaM2002
Verified answer
Х(х-5) =36
х² - 5х -36=0
а=1 ,b=-5, c=-36
D= b² -4ac
D= (-5)² -4*1*(-36) = 25+144=169=13²
D>0 -два корня уравнения
x₁= (5-13)/(2*1) = -8/2=-4
x₂= (5+13)/2 = 18/2 = 9
Ответ: (-4 ; 9)
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Answers & Comments
Verified answer
Х(х-5) =36х² - 5х -36=0
а=1 ,b=-5, c=-36
D= b² -4ac
D= (-5)² -4*1*(-36) = 25+144=169=13²
D>0 -два корня уравнения
x₁= (5-13)/(2*1) = -8/2=-4
x₂= (5+13)/2 = 18/2 = 9
Ответ: (-4 ; 9)