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dsemenishhev
@dsemenishhev
August 2022
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√х^2-7х+21=3Решите уравнение СРОЧНО
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awe20135
(
√х^2-7х+21)^2=3^2
x^2-7x+21-9=0
x^2-7x+12=0
D=49-24=25
x1=(7-5)/2=1
x2=(7+5)/2=6
все
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Answers & Comments
x^2-7x+21-9=0
x^2-7x+12=0
D=49-24=25
x1=(7-5)/2=1
x2=(7+5)/2=6
все