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kostet1803
@kostet1803
August 2022
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Срочно помогите решить 250 и 251 номер!!
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вика5852
250.2x+4y=5x-5y
2x-5x+4y+5y
-3x+9y
9y-3x
y=9/-3x=-3x
y-xy=24
-3x-x(-3x)=24
-3x+3x²=24
3x²-3x-24=0|:3
x²-x-8=0
√D=(-1)²-4*1*(-8)=1+32=33; √33=3√10
x1=4√10/2=2√10
x2=1-3√10/2=-2√10/2=-1√10
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Answers & Comments
2x-5x+4y+5y
-3x+9y
9y-3x
y=9/-3x=-3x
y-xy=24
-3x-x(-3x)=24
-3x+3x²=24
3x²-3x-24=0|:3
x²-x-8=0
√D=(-1)²-4*1*(-8)=1+32=33; √33=3√10
x1=4√10/2=2√10
x2=1-3√10/2=-2√10/2=-1√10