Предмет: Алгебра, автор: ayanajenishbekova2

810) Упростите выражение: а) 5 (4х²-2x+1)-2 (10х²– 6х-1); 6) 7 (2y²-5y-3)-4 (3y²-9y-5); в) а (3b— 1) -b (a-3)-2 (ab-a+b); г) х² (4-у²)+y²(x²-7)— 4х (х-3).помогите​

Ответы

Автор ответа: tatsach
1

Ответ:

Объяснение:

.......

Приложения:
Автор ответа: tatanaklepec96
1

5(4x²-2x+1)-2(10x²-6x-1)=20x²-10x+5-20x²+12x-2=2x+5

7(2y²-5y-3)-4(3y²-9y-5)=14x²-35y-28-12y²+36y+20=2y²+y-8

a(3b-1)-b(a-3)-2(ab-a+b)=3ab-a-ab-3b-2ab+2a-2b=3a-b

x²(4-y²)+y²(x²-7)-4x(x-3)=4x²-x²y²+x²y²-7y²-4x²+12x²=

12x²-7y²

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