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raba452
@raba452
October 2021
1
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Помогите решить 4 и 7 пример на фото,пожалуйста!!!!!!
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Огууурчик
4)x^2+5xy+y^2=25
y=8-5x
x^2+5x(8-5x)+(8-5x)^2=25
x^2+40x-25x^2+64-80x+25x^2=25
x^2-40x+39=0
D=корень из (1600-156)=корень из 1444=38
x1=39; x2=1
7)x^2\(x+3) + x\(x-2) =(11x-12)\(x+3)(x-2)
и тд
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Answers & Comments
y=8-5x
x^2+5x(8-5x)+(8-5x)^2=25
x^2+40x-25x^2+64-80x+25x^2=25
x^2-40x+39=0
D=корень из (1600-156)=корень из 1444=38
x1=39; x2=1
7)x^2\(x+3) + x\(x-2) =(11x-12)\(x+3)(x-2)
и тд