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АлинкаПетр
@АлинкаПетр
August 2022
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2х-х^2=0; b^2-16=0; 16x^2-24x+9=0; 2y^2=0; 3x^2-75=0.
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Answers & Comments
litanalove
1) 2x -x² =0; x(2 -x) =0; x=0; 2 -x =0; x =2
2) b² -16 =0; (b -4)(b +4) =0, b -4=0, b=4;
b+4=0, b= -4
или b² =16; b=корень из 16, b=(+-)4
3) 16x² -24x +9 =0; (4x -3)² =0; (4x -3)(4x-3)=0; 4x -3=0; 4x=3; x=3/4=0.75
4) 2y² =0; y =0
5) 3x² -75 =0; 3x² =75; x²=25; x =(+-)5
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Answers & Comments
2) b² -16 =0; (b -4)(b +4) =0, b -4=0, b=4;
b+4=0, b= -4
или b² =16; b=корень из 16, b=(+-)4
3) 16x² -24x +9 =0; (4x -3)² =0; (4x -3)(4x-3)=0; 4x -3=0; 4x=3; x=3/4=0.75
4) 2y² =0; y =0
5) 3x² -75 =0; 3x² =75; x²=25; x =(+-)5