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kowalskinor
@kowalskinor
July 2022
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срочно!! решите с объяснением
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Кулшат
15.
16. 2x+63=x²; x²-2x-63 =0; x= -7; x =9;отв Ж х=-7
17. -2+3x=x²; x²+2 -3x =0; x= -2; x= -1; отв: х =-2;
18. x²-2x+8 =16; x² -2x -8 =0; x= 4; x =-2; отв: x =-2;
20. 16+6x =x²; x² -6x -16 =0; x= 8; x= -2; отв: x =-2;
21. 6-4x-x² = (4+x)²; 6-4x-x² = 16 +8x +x²; 2x² +12x +10 =0; x² +6x+5 =0;
x= -5; x=-1; отв: х = -5ж
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Answers & Comments
16. 2x+63=x²; x²-2x-63 =0; x= -7; x =9;отв Ж х=-7
17. -2+3x=x²; x²+2 -3x =0; x= -2; x= -1; отв: х =-2;
18. x²-2x+8 =16; x² -2x -8 =0; x= 4; x =-2; отв: x =-2;
20. 16+6x =x²; x² -6x -16 =0; x= 8; x= -2; отв: x =-2;
21. 6-4x-x² = (4+x)²; 6-4x-x² = 16 +8x +x²; 2x² +12x +10 =0; x² +6x+5 =0;
x= -5; x=-1; отв: х = -5ж