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Alexsander091
@Alexsander091
July 2022
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как это решить, помогите пожалуйста )
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boss9800
√4x-11-√x-5=3
(√4x-11)²=(3+√x-5)²
4x-11=9+6√x-5+x-5
3x-15=6√x-5 |:3
(x-5)²=(2√x-5)²
x²-10x+25=4x-20
x²-14x+45=0
D=196-180=16
x1,2=14+-4/2
x1=9
x2=5
x1+x2=14
2 votes
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Answers & Comments
(√4x-11)²=(3+√x-5)²
4x-11=9+6√x-5+x-5
3x-15=6√x-5 |:3
(x-5)²=(2√x-5)²
x²-10x+25=4x-20
x²-14x+45=0
D=196-180=16
x1,2=14+-4/2
x1=9
x2=5
x1+x2=14