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Марьяна1902
@Марьяна1902
August 2022
1
3
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преобразуйте в многочлен
(a-4)(a+4)-2a(3-a)
(a-8)(a-7)-(a-9) в квадрате
(b+3)(b-3)+(2b+3) в квадрате
3(x-5) в квадрате+(10x-8x в квадрате)
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Answers & Comments
litanalove
1) (a-4)(a+4) -2a(3-a) =a² -16 -6a +2a² =3a² -6a -16
2) (a-8)(a-7) -(a-9)² =a² -7a -8a +56 -(a² -18a +81) =a² -15a +56 -a² +18a -81 =3a -25
3) (b+3)(b-3) +(2b+3)² =b² -9 + 4b² +12b +9 =5b² +12b
4) 3(x-5)² +10x -8x² =3(x² -10x +25) +10x -8x² =3x² -30x +75 +10x -8x² =75 -20x -5x²
28 votes
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Answers & Comments
2) (a-8)(a-7) -(a-9)² =a² -7a -8a +56 -(a² -18a +81) =a² -15a +56 -a² +18a -81 =3a -25
3) (b+3)(b-3) +(2b+3)² =b² -9 + 4b² +12b +9 =5b² +12b
4) 3(x-5)² +10x -8x² =3(x² -10x +25) +10x -8x² =3x² -30x +75 +10x -8x² =75 -20x -5x²